Altmetrics are based on social web data such as:
As well as demonstrating impact, altmetrics can be used to find collaborators, or to provide evidence of engagement with the content of a spectrum of research outputs including:
Posters and presentations at conferences, in particular in the medical sciences
Electronic theses and dissertations (ETDs)
Performances in film, theatre, and music
Blogs, web pages
Lectures, online classes, and other teaching activities
Journal articles, books etc.