Do you want to display your contact information in the emails you send out? Then add an email signature!
1. Click on Settings at the top of the page. This should take you straight to Profile Settings.
2. Go to the bottom of the page and look for the box that says Email Signature.
3. Copy and paste your email signature into the box.
4. Click on the Image button 
to insert images into your email signature. When you upload images, be sure to hit "Send it to the Server"
5. To the left of that, click on the "Link" button to embed links.
6. You can also play with formatting, spacing, fonts, etc. in the box.
Note: It's important to keep your email signature updated, as it will be embedded in all the emails you send out.