Why does this happen?

[raffyyy]

So i've been recently seeing that steam has kept updating every time i start up my computer. This is what shows up, don't know if anyone else is having the same problem.
http://postimg.org/image/tf3kcki4z/78e544ad/

[lordi.]

It's cheacking for available update which doesn't mean it's updating. Same for me, it's normal.