If you want to add single links:
In both cases, (adding a list of links or individual ones) make sure that you click on the "test URL" button before you save the link(s).
If you receive a "backlinks test passed" message, go ahead and save the link.
If you receive a "backlink test failed" message, it means there is a problem with the link.
A "backlink test failed" message can mean one of two things:
On the top-left site of your page, you have the option to search for specific links.
Tags, in essence, are a way of grouping entries by category to make them easy to view by topic.
This is a great way to organize your sites and your entire links.
Double clicking on any of the tags' boxes, will open a window with pre-defined tagging options.
You may add/delete options for faster tagging.