What Are Keywords?
Definition & Types for SEO & AEO (2026)
Definition
Keywords are words or short phrases people type into search engines, marketplaces, and AI answer tools to find information, products, or videos. They encode intent - what someone wants next - which is why keywords remain the foundation of SEO and Answer Engine Optimization (AEO) in 2026.
Key takeaways
- Keywords encode search and answer intent, not just rankings.
- Long-tails and question phrases win SEO and AEO visibility.
- Prefer live autocomplete over stale volume estimates.
Types of keywords
Head terms
Broad, high-competition phrases (often one or two words) such as “soccer” or “running shoes.” Useful for category awareness; hard to win alone.
Long-tail keywords
Specific multi-word phrases with clearer intent and usually lower competition - for example “waterproof trail running shoes women.” Research them with the Longtail Keyword Tool.
Informational keywords
Ask- and learn-intent queries (“how”, “what”, “why”). These power blog posts, FAQs, and AI answers - start with the Question Keyword Tool.
Transactional & commercial keywords
Buy-intent phrases (“buy”, “deal”, product names, “vs”). Critical for ecommerce and affiliate pages; platform tools like Amazon and Product surface shopper language.
How search & answer engines use them
Engines match queries to content, judge relevance and quality, then rank or synthesize answers. If your page never uses the phrases people type, matching fails. In 2026, AI Overviews, ChatGPT, and Perplexity also prefer clear question/answer structure - see our AEO guide.
Live autocomplete vs volume estimates
Volume databases go stale. Live autocomplete shows what Google, Amazon, YouTube, and other sources suggest right now for your country. Keyword Tool Dominator focuses on that live signal, plus Keyword Score, Hot Keywords, and Golden Filters to prioritize opportunities.
How to research keywords with Keyword Tool Dominator
- Pick the platform where you publish - start from platform keyword tools.
- Expand intent with research modes (Question, Longtail, Comparison, Preposition, Product).
- Shortlist with filters, then fit copy using utilities.
Deep hubs: Amazon · YouTube · full Learn hub.
Using keywords effectively
- Mix head terms and longtails; map one primary phrase per page or video.
- Place keywords in titles, headings, and natural body copy - never stuff.
- For marketplaces, align title, bullets, description, and backend search terms.
- For AEO, lead with the question and answer it directly in the first paragraph.
Try it free
Run a seed in the Question Keyword Tool or any platform tool - free daily searches, no credit card.