Every girl on the site has her own personal goals and reasons for being a mygirlfund member. You can learn more about a girl by reading her profile and blogs as well as talking to her directly.
Aside from sending messages, you will probably want to show your support by contributing to her fund. The amount you contribute is entirely up to you.
Click on the Contribute button on her profile page to show you support her goals. Your contribution will be deducted from your bank of credits.