Sometime campaigns name don't convey all the information you want for a campaign. That's where Tags come in handy.
Setting tags allow you group campaigns together and show up in the search box of the campaign manager.
Setting a tag is easy. Open the campaign in the Campaign Manager. Click the Tags box and type a tag followed by a comma and then the next tag (if required). There is no limit to amount of Tags you can set.
To delete a tag - simply click the X in the tag. Everything is saved automatically.
Tip: When using the API call /campaign tags are included in the list of campaigns returned.