on my wifi page linksys what does the Renew Lease mean? I'm having trouble staying connected to my home wifi, does this have anything to do with that?

I'm having trouble staying connected to my home Wifi, it keeps going to 3G (I have never had this problem until today) When it is connected while I'm close to the router I click on the circled i after the linksys & it goes to the IP adress stuff, down a little waysafter the DNS & sarch domains it says Renew Lease - should I click on that?