SEO has its own vocabulary, and much of it sounds more complicated than it is. This glossary explains the terms a business owner is most likely to hear from an agency, see in Search Console or read in Google's documentation, in plain words and grouped by topic so related ideas sit together. You do not need to memorise them; keep the page handy for the next time a report or proposal lands on your desk.

How search works

Crawling. Search engines send automated programs (crawlers or bots) to visit pages by following links. If a page cannot be crawled, it cannot be found.

Indexing. After crawling, the search engine stores what it understood about the page in its index, a huge library. Only indexed pages can appear in results.

Ranking. The order in which indexed pages are shown for a search, based on many signals such as relevance, quality and usefulness.

SERP. Search engine results page: everything Google shows after a search, including ads, maps, videos and AI answers.

Query. The exact words someone types or speaks into a search box.

Search intent. What the person actually wants: to learn something, find a specific site, compare options or buy. Matching intent matters more than matching words.

On your own pages

Keyword. A word or phrase people search for, such as "school uniform tailor in Pabna".

Title tag. The page title shown as the clickable headline in search results and on the browser tab.

Meta description. A short summary you write for a page. Google may show it under the title, or choose other text from the page.

Headings (H1, H2, H3). The titles and subtitles that structure a page. They help readers skim and help search engines understand the topics.

Alt text. A short description of an image, read aloud by screen readers and used by search engines to understand the picture.

Internal link. A link from one page on your site to another. Anchor text is the clickable wording of a link.

Structured data (schema). Extra code that labels information on a page, such as your business hours or a product's price, so search engines read it exactly. See structured data explained.

Canonical URL. The version of a page you tell search engines is the main one, when similar copies exist. See canonical URLs explained.

Beyond your website

Backlink. A link from another website to yours. Relevant links from trusted sites act like recommendations; bought or spammy ones can do harm.

Domain authority. A score invented by SEO tool companies to estimate a site's strength. It is not a Google measure, just a rough guide.

Citation. A mention of your business name, address and phone number on another site, such as a directory.

NAP. Name, address, phone. Keeping these identical everywhere builds trust with people and search engines.

Google Business Profile. Your free business listing on Google Search and Maps, with hours, photos, reviews and directions.

E-E-A-T. Experience, expertise, authoritativeness and trustworthiness: qualities Google's guidelines look for, especially on health, money and legal topics.

Technical terms

Sitemap. A file listing the pages you want search engines to know about.

robots.txt. A file telling crawlers which parts of a site they may visit. It controls crawling, not indexing.

Noindex. An instruction on a page asking search engines not to include it in results.

301 redirect. A permanent forward from an old URL to a new one, which passes most of the old page's value along.

404 error. The "page not found" response. A few are normal; important pages returning 404 are not.

Core Web Vitals. Google's measures of loading speed, responsiveness and visual stability, based on real visitors.

Mobile-first indexing. Google mainly uses the mobile version of your site to index and rank it.

Hreflang. Code that tells search engines which language or regional version of a page to show, such as Bangla or English.

Measuring results

Impression. One showing of your page in search results, whether or not anyone clicked.

Click. A searcher choosing your result and visiting your page.

CTR (click-through rate). Clicks divided by impressions. A low CTR on a page with many impressions often means the title or description needs work.

Average position. Your page's average place in results across many searches. Treat it as a trend.

Organic traffic. Visitors who arrive from unpaid search results.

Conversion. A visitor doing what you want: calling, sending a message, filling a form or buying.

Search with AI

AEO (answer engine optimisation). Shaping content so it becomes the direct answer in snippets and voice assistants.

GEO (generative engine optimisation). Making your business easy for AI tools such as ChatGPT, Gemini or Claude to understand and mention. The article on SEO, AEO, GEO and AIO compares these terms.

AI Overviews. AI-written summaries Google shows at the top of some results, with links to sources.

Entity. A clearly defined thing, such as a person, business, place or product, that search engines recognise and connect to facts.

Using this glossary

When a report uses a term you do not know, look it up here, then ask the person what it means for your business specifically. If Search Console shows problems you cannot interpret, a technical SEO audit is the usual next step, or you can get in touch.

Related service SEO, AEO, GEO and AIO Get found on Google and in AI answers: technical SEO, content, local SEO and Google Business Profile.