I believe it strips everything after a "+" so you can use youraddress+servicename@gmail.com. It ignores periods so you could also use your.address@gmail.com or

I believe it strips everything after a "+" so you can use youraddress+servicename@gmail.com. It ignores periods so you could also use your.address@gmail.com or y.ouraddress@gmail.com or whatever. Some sides block plus addressing but that's what I use a lot of the time.