Interest is something like a saying initial "Hello" to that person, you cannot send any other personalize information to that person.

Interest can be treated as a "I like to get to know you better if you are also interested in my profile".

If you want to see who has shown 'Interest' in you, click on the 'Interests' link at the top of the screen.

This will show you a list of all the people who have shown 'Interest' in your profile. From here you can click on the user's Username to see their full profile.

Login frequently to the website and adding a photo will increase you interests. Because search results are arrange in a such a way that users with photos that regularly use the website will come first in the search results.

The amount of 'Interests' you are allowed to send is currently limited to 100 per day.