“Tagging” in this context means, giving it additional attributes in the dropdown menus that become available when you edit the title of the original post:
Step 1:
Click on the pencil icon to edit the title :
Step 2
click in the area for “optional tags”
Step 3
Scroll in the drop down menu and select the desired tag. (One can do this multiple times to select more than one tag - if appropriate).
Step4:
Click the check-mark to save the changes.
After doing that, it your original post will appear correctly in listings of feature requests.