Before generative AI, search engines already answered many questions directly on the results page through answer features such as featured snippets, knowledge panels and spoken answers from voice assistants. Google applies the same snippet controls to these features and to its AI Overviews.[1][2]
Featured snippets
Featured snippets are special Google results that show a descriptive excerpt before the page's title and link, and can also appear in "People also ask" boxes.[1] Google launched them in January 2014, and when read aloud by voice assistants they name their source.[3] Site owners cannot mark a page as a featured snippet; Google's systems decide automatically, and clicking one takes users directly to the quoted section of the page.[1]
Snippet controls
The nosnippet rule blocks all snippets, data-nosnippet excludes marked sections of a page, and a lower max-snippet value can discourage featured snippets, though Google says it does not guarantee they disappear.[1] The same controls also limit how content is used in Google's AI Overviews and AI Mode.[2]
Knowledge Graph
Google introduced the Knowledge Graph on May 16, 2012, under the slogan "things, not strings," with more than 500 million objects and 3.5 billion facts drawn from sources including Freebase, Wikipedia and the CIA World Factbook.[4] By 2020 it held more than 500 billion facts roughly five billion entities.[5]
Knowledge panels
Knowledge panels are information boxes about entities in the Knowledge Graph, generated automatically from content across the web. They cannot be edited directly, but anyone can send feedback, and verified representatives can suggest changes.[6] People and organizations can claim a panel by signing in to an official profile Google lists, while local businesses manage their information through Google Business Profile instead.[7]
Voice assistants
A 2017 Pew Research Center survey found that 46% of U.S. adults used digital voice assistants, mostly on smartphones, and that hands-free use was the most common reason.[8] Google's Speakable markup, in beta for English-language news publishers in the U.S., marks sections of articles that Google Assistant can read aloud.[9]
Question-and-answer markup
Since August 2023 Google has shown FAQ rich results only for well-known, authoritative government and health websites, and it deprecated HowTo rich results in September 2023.[10]
References
- ^ ^ ^ ^ "Featured snippets and your website". Google Search Central, updated December 10, 2025. developers.google.com
- ^ ^ "Robots meta tag, data-nosnippet, and X-Robots-Tag specifications". Google Search Central, updated March 24, 2026. developers.google.com
- ^ Sullivan, Danny (January 30, 2018). "A reintroduction to Google's featured snippets". Google. blog.google
- ^ Singhal, Amit (May 16, 2012). "Introducing the Knowledge Graph: things, not strings". Google. blog.google
- ^ Sullivan, Danny (May 20, 2020). "A reintroduction to our Knowledge Graph and knowledge panels". Google. blog.google
- ^ "About knowledge panels". Google Knowledge Panel Help. support.google.com
- ^ "Get verified on Google". Google Knowledge Panel Help. support.google.com
- ^ Olmstead, Kenneth (December 12, 2017). "Nearly half of Americans use digital voice assistants, mostly on their smartphones". Pew Research Center. pewresearch.org
- ^ "Speakable (BETA) schema markup". Google Search Central, updated September 8, 2026. developers.google.com
- ^ Mueller, John (August 8, 2023). "Changes to HowTo and FAQ rich results". Google Search Central Blog. developers.google.com