You've been there: you remember you once found an article somewhere that you liked and now you desperately need to find it again. But on which social network did you mark it as your favorite? This is where Favs helps by collecting all stared, liked, favorite, etc. entries and make them searchable on your Mac.
But not only you collect such precious information, your friends do to. Therefore with Favs you can also follow their Favs and learn from it.
Most parts of the app should be self explanatory. Anyway you might discover more functionality than you expected like the features of Search, Tags or Quicklook.
Some Service require some more than the login credentials e.g. you need a paid subscription for Instapaper and Pinboard, and you might need to set some data to public like on Flattr, , , and .