Synchronized Multimedia Integration Language (SMIL) is a markup language used to synchronize multimedia content such as audio, video, and animations on web pages. SMIL is an XML-based language that can be used to integrate and synchronize different types of media on the web. SMIL can be used to integrate and control time-synchronized multimedia content in websites. For the file extension .smi or .smil is used.
SMIL represents an additional element in search engine optimization, as es helps to make multimedia content more accessible. By synchronizing text transcriptions, audio descriptions and subtitles in SMIL presentations, search engines can better interpret and index the content. This enables better accessibility for people with visual or hearing impairments, resulting in a positive user experience and potentially having a positive impact on search engine rankings.