You can enter skills you have or your expertise directly to your personal profile. Others in the community can then endorse those skills and expertise. A number will appear next to the skill as people endorse it to show you how many have chosen to endorse that skill. Clicking the number will display a list of the users.
Add Skills and Expertise:
Click the drop down next to your name or avatar.
Choose the View Profile link.
Below the header section of the profile on the far right side is a section called Skills and Expertise.
Click the New skill button.
The process of adding skills is the same as adding tags to your content, but in this case you’re adding tags to yourself.
Enter the keyword or series of keywords that you want to add. Tags can contain more then one word.
To finish the tag, type the comma button or hit the enter key.
Click the Add button to add the skill to your profile.