They differ in that they can be easily changed and provide a bit more space to describe whatever it is you feel relevant.Quotes from famous people that you admire, agree with or want to emulate are quite popular in tag lines, as are truisms and lines from famous movies or songs.
No matter what its title, most online dating sites will require a paragraph or two from you in essay format, describing who you are and what you are looking for.
Light and fun works well for dating or friendship-based profiles, but you can be a little bit more serious for relationship-oriented profiles.
Racy or adult-natured tag lines are only appropriate on adult dating sites.
If this part of the process seems too daunting to you, or if you'd rather not invest the time, sign up at one of the online speed dating sites instead, as most don't use essay introductions in their profiles.
Quickly brainstorm what you'd like to share in the essay portion of your dating profile on a piece of paper.
These points are what you'll focus on weaving into your essay next, using what I call the "Fly On the Wall" technique.