How to setup Gmail alias.
You might be aware of Alias feature in Gmail where you can setup additional email alias, the reason why I am saying about Gmail alias is that when you sign up using your email address to the websites you trust might it be Amazon, Ebay or Facebook you can use your custom alias which you have setup and can labeled on some other folder easily with filter option on Gmail, but the most important thing is that if they ever sell you email you can easily sue them.
Sometimes you might be surprised that how so many unknown peoples know your email and send promotional offers and spam ? the big reason somewhere you must have used your email id to sign up or to used your email id to make a comment or to download.
How to setup Gmail alias
→ Login to your Gmail account and click on the gear icon and from the dropdown options click on settings and go to accounts and imports Quick link click on Add another email address you own a pop up window comes up with name and email input option, on the name field type whatever you wish to, in my case I am going to name it Amazon shopping and suppose my email id is John@gmail.com so I can create an Alias as Johnemail@example.com you need your gmail alias+whatever @gmail.com click on next and its done.