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What Is an AI Agent? Everything You Need to Know in 2026
AI agents are autonomous systems that can plan, reason, and take action on your behalf. We break down exactly how they work, where they shine, and what to watch out for — in plain English.
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We built the AI guide we wanted to read.
Every time a new AI tool launches, the coverage falls into one of two camps. Either it's buried in technical jargon that only machine learning engineers can parse, or it's a surface-level listicle clearly written to rank on Google and collect affiliate clicks. Neither helps you actually decide what to use.
So we built whatiswhat.ai. Plain-English explanations of AI concepts — what they are, how they work, and when they matter. Tool guides that compare options side by side, with clear criteria and honest limitations. No hype, no panic, no "10x your productivity" nonsense.
Every guide follows the same structure: what it is, why it matters, how to evaluate it, and what to watch out for. We research each tool against primary sources — vendor documentation, G2 and Capterra reviews, community forums, and our own testing. Then we update those guides as the market shifts, because a guide written once and forgotten is worse than no guide at all.
Why Trust Us
Honest about what we know, honest about what we don't — and always transparent about how we make money.
Editorially Independent
No advertiser or partner influences our editorial choices. Pages may contain affiliate links, but commission rates never affect rankings or recommendations.
Researched & Verified
Every guide is researched against primary sources — G2, Capterra, vendor documentation, and community reviews. Rankings are updated as the market shifts, not set once and forgotten.
Fully Disclosed
Some pages contain affiliate links, clearly disclosed at the top of each article. Commission rates never affect rankings or recommendations — the best tool wins, not the highest bidder.
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