Google change the algorithm to give the correct results without spam to the users quires.
cheers,
forumseo

yes google change at every year

Google use to update the algorithm to prevent the spammers...

Originally Posted by SearchBliss

Hey guys i just wanna know how frequently Google keeps changing its Algorithm. Looking forward for your replies?

It's constantly in a state of flux. This is a good thing, it means no one ever really has the "key" to the algorithm and no one can ever really "figure it out". Because it isn't a set of digits, it's a living, breathing apparatus to help individuals search. Okay, maybe it isn't living or breathing, but it changes as the Internet does--and that's how Google stays on top.