Does LinkedIn make you look good?

[Jaedon]

When using sites like linked in or websites that advertise yourself and your skills, does it look good? Or does it just look like you're boasting about how awesome your resume is online. I strongly doubt people make connections through linkedin and when you submit your resume to employers...you've already submitted you resume so there's no need for them to see it yet again on your linkedin account. Despite having my fair share of accomplishments myself, whenever I see a friend with an extraordinarily thorough linkedin account, it looks as through they're boasting and trying to receive praise and acknowledgment for this accomplishments rather than remaining modest. At the same time, I guess it does help create a name in the online world...but it's rather redundant when employers already see your resume...

is there something im missing...it's just. I'm wondering whether or not I should update my linkedin account. Is there a benefit? Or will it just envoke jealousy and make my peers negatively regard me?