A disclaimer is a statement that limits a publisher's liability or warns visitors about how to rely on a website's content, products, or services. Common types include no-guarantee, professional advice (medical, legal, financial), affiliate, copyright and fair use, and — increasingly — AI-generated content disclaimers. Placement matters: clickwrap acceptance is strongest, a dedicated page or terms of service is solid, a footer link is weakest. Disclaimers can shield against ordinary negligence, but they can't disclaim fraud, gross negligence, or statutory consumer protections under the UK Consumer Rights Act or US FTC rules. A copy-paste boilerplate from a similar site rarely holds up.