It's pretty common these days for anyone who wants to know something about you to use Google paint a picture of who you are. Getting a job sometimes can come down to what comes up in a web search, regardless of your resume. Given its importance, services such as claimID are now giving you ways to "claim" the sources that you want to represent you. Ultimately all it does is let you aggregate which sources you'd like on the web to reflect you, pull them into one place as a picture of you, and then use the collective of links to optimize in search engines so that claimID is the highest ranking source revealed when someone searches for you.
Check out my profile here. My claimID is now 7th ranking for "skobac" and 6th for "kevin skobac" on Google. On Yahoo it's 8th for "skobac" and 3rd for "kevin skobac."