That feature is only filtering one tag. Oh, and you need to be logged in for it to work. If you see threads where people complain that the feature does not work, it probably was that reason.
There is some external tools I made, if you use a desktop browser. But filtering away several tags is not that powerful, imho. Selecting a few positive tags goes a long way. But tags are not very accurate to begin with. I favor the script that let's you hide individual games at the press of a button.