Adding tags to an image
If you are on the image page, you'll see on the sidebar all the tags that were already added to that image. Below those tags you'll see the form tag. You can add tags the same way as described above, just write the tags separated with comma and click the pink add button.
Removing tags from an image
You can only remove tags that you've created yourself. When you add a tag to an image you'll see a X button next to it. Just click this button to remove it.
Tags are keywords that describe an image. They make it easier for you and other people to find interesting images by topic.
To add tags to an image you must have an account on We Heart It and be logged in. If you're not logged in you won't be able to see the tag form.