25 essential terms explained in plain English — no jargon, just clarity.
Optimising content so AI answer engines like Perplexity and ChatGPT cite your website.
AEO is the practice of structuring content, schema markup, and authority signals so that AI-powered answer engines (Perplexity, ChatGPT, Google AI Overviews, Gemini) pull from your website when generating responses to user queries.
Example: An Orbilox blog post about HVAC SEO becomes cited by Perplexity when users ask 'How do HVAC companies get more leads online?'
The clickable words in a hyperlink that tell search engines what the linked page is about.
Anchor text is the visible, clickable text in a hyperlink. Search engines use it as a relevance signal — if many sites link to your page using the anchor text 'local SEO services', Google understands your page is about local SEO.
Example: A blog post linking to Orbilox's service page using the anchor text 'SEO agency Australia' reinforces that page's relevance for Australian SEO queries.
A link from another website pointing to your site — the backbone of SEO authority.
A backlink (also called an inbound link) is a hyperlink on an external website that points to your domain. Backlinks from high-authority, relevant websites are one of Google's top three ranking factors. Quality matters far more than quantity.
Example: A mention in Forbes linking to your agency's case study passes significant authority and boosts your domain rating.
The percentage of visitors who leave your site after viewing only one page.
Bounce rate measures the proportion of single-page sessions where users leave without interacting further. A high bounce rate on a landing page often signals mismatched intent, slow load times, or poor user experience. It is not a direct Google ranking factor but correlates strongly with engagement metrics that are.
Example: If 70% of visitors to your PPC landing page leave immediately, your ad targeting or landing page content likely doesn't match what searchers expected.
The preferred URL for a page when multiple URLs serve the same or similar content.
A canonical tag (`<link rel='canonical'>`) tells search engines which URL is the 'master' version of a page. It prevents duplicate content penalties by consolidating ranking signals onto your preferred URL rather than splitting them across multiple URLs.
Example: If your product page is accessible at both /products/seo and /products/seo?ref=footer, the canonical tag points Google to the clean URL.
The percentage of visitors who complete a desired action (lead form, purchase, call).
Conversion rate = (conversions ÷ total visitors) × 100. A 3% conversion rate means 3 out of every 100 visitors take the target action. Conversion Rate Optimisation (CRO) improves this number through better UX, copy, offers, and page speed.
Example: An Orbilox landing page test increased a client's form submissions from 2.1% to 4.8% by simplifying the form and adding social proof.
Google's three page-experience metrics: loading speed (LCP), interactivity (INP), and visual stability (CLS).
Core Web Vitals are a set of real-world performance metrics Google uses as ranking signals. LCP (Largest Contentful Paint) measures load speed, INP (Interaction to Next Paint) measures responsiveness, and CLS (Cumulative Layout Shift) measures visual stability. All three should be in the 'Good' range.
Example: A client's homepage had a 6.2s LCP — after image optimisation and lazy loading, it dropped to 1.8s, improving both rankings and bounce rate.
The total cost of acquiring one paying customer through a marketing channel.
CPA = total marketing spend ÷ number of customers acquired. It's the definitive measure of paid campaign efficiency. Smart PPC management targets a CPA that fits within your unit economics — ideally well below your average customer lifetime value.
Example: If you spend $5,000 on Google Ads and acquire 25 new clients, your CPA is $200 per client.
The price you pay each time a user clicks on your paid search or display advertisement.
CPC is determined by Google Ads' real-time auction system, factoring in your maximum bid, ad Quality Score, and competitor bids. High-competition keywords in industries like legal, finance, and insurance can have CPCs exceeding $50.
Example: A personal injury lawyer bidding on 'car accident attorney' may pay $75 CPC in major US cities — but a single converted client could be worth $10,000+.
The average cost to generate one qualified lead through a marketing channel.
CPL = total campaign spend ÷ number of leads generated. Unlike CPA, CPL measures leads (not necessarily paying customers). It's the primary efficiency metric for B2B and service businesses running PPC or paid social campaigns.
Example: An HVAC company reduced CPL from $85 to $34 by switching from broad-match keywords to exact-match plus Local Services Ads.
The percentage of impressions that result in a click — measures ad or listing appeal.
CTR = (clicks ÷ impressions) × 100. In organic search, a higher CTR tells Google your listing is relevant and appealing. In paid ads, CTR directly affects Quality Score and CPC. Average organic CTR for position 1 is ~28%; positions 2–3 fall to 15% and 11%.
Example: Adding FAQ rich snippets to a service page increased organic CTR from 4.2% to 7.1% by making the listing more prominent in Google results.
A 1–100 score (by Moz/Ahrefs) predicting how well a domain will rank in search engines.
Domain Authority (DA) and Domain Rating (DR) are third-party metrics — not used by Google directly — that estimate a site's ranking power based on its backlink profile. New sites start near 1; major publishers like Forbes sit above 90. Useful for comparing sites relative to each other.
Example: Orbilox targets clients for link outreach at DR 40+, as backlinks from these domains meaningfully lift client keyword rankings.
Google's quality framework: Experience, Expertise, Authoritativeness, and Trustworthiness.
E-E-A-T (formerly E-A-T) guides Google's Search Quality Raters in evaluating content quality. Google's algorithms use signals like named author credentials, backlinks from authoritative sources, business transparency, and review counts to assess E-E-A-T. YMYL (Your Money or Your Life) topics like health, finance, and legal are held to the strictest E-E-A-T standards.
Example: A medical clinic's blog posts written by named doctors with credentials and published review dates score higher on E-E-A-T than anonymous, undated articles.
The answer box shown at the top of Google results (Position Zero) for informational queries.
Featured Snippets appear above organic results and display a direct answer pulled from a webpage. They come in paragraph, list, and table formats. Ranking in Position Zero can double organic CTR for that keyword. Proper use of heading structure, FAQ schema, and concise answer formatting maximises snippet eligibility.
Example: Orbilox's FAQ page answers 'What is local SEO?' in under 40 words with a clear definition, earning a paragraph snippet for that query.
Optimising your content to be the source AI models use when generating answers.
GEO focuses on making your content the reference material that AI language models draw from when generating responses. Key signals include structured data (schema markup), comprehensive factual coverage, named author expertise, and being cited by other authoritative sources. Unlike traditional SEO, GEO targets the training and retrieval systems of AI models.
Example: Orbilox's digital marketing glossary page is structured with DefinedTerm schema so AI models can reliably extract and cite accurate definitions.
Google's free business listing that appears in Maps and local search results.
Google Business Profile (formerly Google My Business) is the primary tool for local SEO. Completing all profile fields, adding photos, posting weekly updates, and generating consistent reviews directly influences your Google Maps Pack rankings — the three local results that appear above organic search results.
Example: An HVAC company that added 80 new reviews and posted weekly GBP updates moved from position 7 to position 2 in the local pack within 90 days.
An HTML tag that tells Google which language and country version of a page to show each user.
Hreflang tags (`<link rel='alternate' hreflang='en-AU'>`) solve international SEO by telling Google which page version to serve users in each language/country combination. Without hreflang, Google may show an English (US) page to Australian users, harming relevance and rankings in that market.
Example: Orbilox adds hreflang tags pointing to country-specific pages for Australia (en-AU), India (en-IN), Italy (it-IT), and Singapore (en-SG).
Specific, lower-volume search phrases with higher purchase intent and less competition.
Long-tail keywords are typically 3+ word phrases (e.g., 'affordable SEO agency for small business Sydney') as opposed to head terms ('SEO agency'). They have lower monthly search volume individually but collectively represent 70% of all search queries. They also convert at 2–5x higher rates due to stronger purchase intent.
Example: Instead of competing for 'plumber Sydney' (1,000s of competitors), a plumber ranks for 'emergency plumber Parramatta 24 hour' — lower competition, higher conversion.
The 150–160 character summary shown below your page title in Google search results.
Meta descriptions don't directly affect rankings, but they significantly influence click-through rate. A well-written meta description that matches search intent and includes a clear value proposition can increase CTR by 30–40% — which in turn sends positive engagement signals to Google.
Example: Changing a meta description from 'We offer SEO services' to 'Rank #1 on Google in 90 days — certified SEO specialists, transparent monthly reports, no lock-in contracts' lifted CTR by 35%.
An advertising model where you pay only when a user clicks your ad.
PPC advertising (primarily Google Ads and Meta Ads) places your message in front of high-intent audiences and charges per click. Unlike SEO, PPC generates immediate traffic and is highly controllable — you set budgets, target keywords, and pause or scale campaigns instantly. The tradeoff: traffic stops when spend stops.
Example: A solicitor spending $3,000/month on Google Ads at $45 CPC receives ~67 clicks, converts 8% to consultations (5–6 leads), and closes 2 clients worth $8,000+ each.
Creating thousands of SEO-optimised pages at scale using data and templates.
Programmatic SEO automates the creation of large volumes of unique, search-optimised pages by combining structured data (cities, services, industries) with content templates. Executed correctly, it can produce tens of thousands of indexable pages that capture long-tail traffic at scale. Executed poorly, it creates thin, duplicate content that Google penalises.
Example: Orbilox uses programmatic SEO to generate 69,000+ service pages across 5 countries — each with unique market stats, local FAQs, and pricing data.
Revenue earned for every dollar spent on advertising.
ROAS = revenue generated ÷ ad spend × 100. A ROAS of 400% means you generated $4 for every $1 spent. ROAS is the primary efficiency metric for e-commerce PPC campaigns. Service businesses often prefer CPA or CPL since revenue attribution is less direct.
Example: An e-commerce brand spending $10,000/month on Google Shopping Ads and generating $42,000 in attributed revenue has a ROAS of 420%.
Structured data code that helps search engines understand your content and display rich results.
Schema markup (Schema.org vocabulary) is JSON-LD code added to your pages that tells search engines exactly what your content is — a FAQ, a review, a product, a business, a recipe. It enables rich results (star ratings, FAQ dropdowns, event times) in Google SERPs and helps AI systems accurately extract and cite your content.
Example: Adding FAQPage schema to a service page earned it a dropdown FAQ snippet in Google results, increasing CTR from 4.5% to 9.2%.
The underlying goal a user has when typing a search query — informational, navigational, or transactional.
Search intent (or keyword intent) categorises what users actually want: information (how does X work?), navigation (find a specific site), commercial investigation (best X for Y), or transactional (buy X now). Google's algorithm strongly favours content that matches the dominant intent for each query — mismatching intent is the #1 reason content fails to rank.
Example: Someone searching 'SEO pricing' has commercial investigation intent — they want comparison information, not a 2,000-word SEO tutorial.
The practice of improving a website's visibility in organic (unpaid) search engine results.
SEO encompasses all strategies that improve a website's ranking in search engines like Google and Bing. It includes technical SEO (site speed, crawlability, structured data), on-page SEO (keyword optimisation, content quality, internal linking), and off-page SEO (backlink acquisition, brand signals). Effective SEO produces compounding, long-term organic traffic without ongoing ad spend.
Example: After a 6-month SEO campaign, a Melbourne law firm grew from 200 monthly organic visitors to 2,400 — generating 12 new client enquiries per month at zero ad spend.
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