Tangensys • Plan, deliver, measure
SEO and AI search learning hub
Plain-language explanations and practical guides for better website and marketing decisions.
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Search and local visibility
What is search everywhere optimisation?
People can discover a business through search engines, maps, video, marketplaces and social platforms.
Learn moreWhat is E-E-A-T?
E-E-A-T describes qualities used in Google’s search quality evaluation guidance.
Learn moreHow search engines work
Discovery, crawling, indexing and ranking are related but separate.
Learn moreWhat is crawl budget?
Crawl budget concerns how much of a site a search engine crawls.
Learn moreWhat are backlinks?
A backlink can help people discover a page and provide context about it.
Learn moreWhat is anchor text?
Anchor text should tell a person where a link leads.
Learn moreWhat is black hat SEO?
Black-hat tactics try to manipulate search systems by breaking their policies.
Learn moreWhat is keyword stuffing?
Keyword stuffing is unnatural repetition intended to manipulate relevance.
Learn moreWhat are Google penalties?
A manual action is communicated in Search Console.
Learn moreWhat is the Google local pack?
The local pack presents businesses for searches with local intent.
Learn moreWhat is NAP consistency?
NAP means name, address and phone number.
Learn moreGoogle Business Profile: a practical guide
Begin with eligibility and accurate business information.
Learn moreGoogle Search Console: a beginner’s guide
Search Console reports how Google discovers and presents the site.
Learn moreGoogle Keyword Planner: a beginner’s guide
Keyword Planner provides advertising-oriented keyword ideas and estimates.
Learn moreAI search and automation
What is answer engine optimisation (AEO)?
AEO is a useful label for making answers easy to find and understand.
Learn moreWhat is generative engine optimisation (GEO)?
GEO focuses attention on how a business is represented in generated answers.
Learn moreGEO vs SEO: what is the difference?
SEO and GEO overlap in the work that makes useful information discoverable and understandable.
Learn moreAEO vs SEO: what is the difference?
SEO includes technical discovery, page relevance, internal linking and broader visibility work.
Learn moreWhat is a large language model (LLM)?
An LLM generates language by modelling patterns learned during training.
Learn moreWhat is Google AI Mode?
AI Mode provides a conversational search experience that can explore related parts of a question.
Learn moreWhat are Google AI Overviews?
An AI Overview summarises information for some searches and can link to supporting pages.
Learn moreWhy is my site not in AI Overviews?
There is no application that ensures an ordinary page is selected for an AI Overview.
Learn moreWhat are zero-click searches?
A zero-click search ends without a visit to a website.
Learn moreHow does ChatGPT search work?
ChatGPT search can use web information and link to sources in an answer.
Learn morePerplexity SEO: how to appear in Perplexity answers
Perplexity visibility is observed through answers and cited sources rather than a single fixed ranking position.
Learn moreGoogle Gemini and search
Gemini is used through experiences with different capabilities, so identify the actual tool and whether it uses web information.
Learn moreMicrosoft Copilot search
Copilot experiences can combine generated answers and web search information.
Learn moreWhat is llms.txt?
llms.txt is a proposed way to offer an overview and links intended for language-model tools.
Learn moreAI agents in search
An AI agent can break a task into steps and use tools, such as search, to gather information or take an action.
Learn moreWhat is agentic commerce?
Agentic commerce describes shopping tasks assisted or carried out by AI agents.
Learn moreWebsites and ecommerce
What is schema markup?
Structured data labels information in a machine-readable form.
Learn moreWhat is robots.txt?
robots.txt controls requests by compliant crawlers.
Learn moreWhat is an XML sitemap?
A sitemap gives search engines a list of preferred URLs to discover.
Learn moreWhat are canonical tags?
A canonical identifies a preferred version among duplicate or very similar URLs.
Learn moreWhat is hreflang?
hreflang connects genuine alternate language or regional pages.
Learn moreWhat are Core Web Vitals?
Core Web Vitals cover loading, interaction responsiveness and visual stability.
Learn moreAgency delivery
SEO agency vs freelancer
Choose the working arrangement around the tasks you cannot cover internally.
Learn moreIn-house vs outsourced SEO
In-house knowledge helps connect search work with the product and customer.
Learn moreHow to choose an SEO agency
Ask the agency to explain the first problem it would investigate and how it would prove that problem matters.
Learn moreUse the library for the decision you are making
Understand a concept
The plain-language explanations distinguish similar terms and explain their limits. Start here when a report, proposal or tool uses unfamiliar language. A definition should help you interpret a real decision, not introduce another acronym to buy.
Investigate a problem
The practical guides trace a task, show what evidence to retain and explain common misreadings. Follow the part relevant to your website or campaign. Examples are hypothetical unless an actual approved project is explicitly identified.
Choose the next action
Related services explain proposed scope and handover. Reading a guide does not mean every task needs outsourcing. Use the information to decide what your team can do and where a specialist review may help.
Read examples and platform references in context
Illustrative numbers demonstrate arithmetic or a planning decision; they are not market averages, client results or Tangensys prices. A tool interface or policy can change, so review the linked official information for the actual implementation.
Compare the guidance with your own evidence. A broken form, unclear offer and low demand can all produce few enquiries, but they need different remedies. The library helps separate those causes instead of prescribing the same package for every problem.
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