As Jeff mentioned [in his post:][1]

> There is a default tag filter on http://stackexchange.com/ but you
> must be logged in:
> 
> 1. click "Tagged questions" at the top
> 
> 2. click "my filters"
> 
> ![stackexchange.com tagged questions, my filters][2]
> 
> Then look for the default "Favorite Tags" filter.
> 
> ![default Favorite Tags filter][3]
> 
> You can browse it in your browser, or have it emailed to you, or get
> the RSS feed at the bottom of the page (also present in the headers,
> too, if your browser auto-detects).
> 
> ![favorite tags RSS feed][4]


  [1]: http://meta.stackoverflow.com/a/101575/133693
  [2]: https://i.sstatic.net/gdJD7.png
  [3]: https://i.sstatic.net/BQk5c.png
  [4]: https://i.sstatic.net/SmbAL.png