Unsure about altmetrics? Check out this video, less than three minutes long, that will give you an introduction.
We’ve been using altmetrics at the BJGP for a while now. You can see them for each individual article by clicking on the ‘Info’ tab (as shown below).
At the bottom of the Info tab is the altmetric information where the wider impact, beyond that of simple citations, of the article is represented in graphical form. For instance, here is the ‘donut’ for the article shown and you can click on it to visit its own Altmetric page.