Semantic markup is code added to web pages to describe the meaning of content elements and their relationships, giving search engines and other systems clearer context beyond visual layout.
It enables rich search results, social media previews, content embedding, and data reuse, while also improving accessibility by supporting WCAG requirements and helping blind users who rely on screen readers better understand page structure, navigation, and content purpose.
According to our research, semantic markup technologies are used on 70.4% of all websites.
17.4% of these sites use only one semantic markup technology, 18.2% use two, and 64.4% use three or more simultaneously.
⭐ Most Popular in 2026
The following chart shows the leading semantic markup technologies in 2026, based on market share.
The most popular is ARIA with an impressive share of 87%, followed by Open Graph with 72.3% and Twitter Cards with 54.9%.
Here is a list of technologies that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.
ARIA with an impressive share of 87%, followed by 
Open Graph with 72.3% and 
Twitter Cards with 54.9%.oEmbed 38.5%
SearchAction 38.3%
Dublin Core 1.5%
RDFa 1%GoodRelations 0.04%
e-GMS 0.002%
Semantic HTML