Is there any New Update in Google in May Month ?

Is there any New Update in Google Algorithm in May Month ?

Maybe this will help you

http://www.entrepreneur.com/article/226670

This is also a nice and easy to understand resource: http://mozcast.com/

I suggest you read the About/Metrics page so you understand it fully. It's not perfect like anything, but none the less can be a good indicator of upcoming algorithm changes.