Hey GayandTired!
You can actually add tags yourself to any story, below each story is a special widget that allows you to add and remove tags. Best would be to add tags that are already known by the system, to see a list of these, click the three lines button on the left of the widget:
You can also search for tags already. The easiest way is just to click on a tag in the list of stories, that will automatically open a search window listing all stories tagged with the same tag.
But you can also start a manual search with the ‘Seatrch’ function and select a list of tags you’re looking for. When you’re done with your changes, click the “Update” button on the right to save your changes.
And, finally, you can block certain tags you don’t want to see ever. That will block all stories which are tagged with any of the tags you’ve defined from being listed anywhere.
To block tags, you can use the ‘Block Tags’ widget:
I hope that’s helping you, let me know if you have additional questions!