Onename is a distributed identity system, kind of like Facebook Auth, built on the blockchain.
If you have a Onename that you like to use on the Internet, you have to import it to Blockstack before November 11th, or you will lose it.
To do that, you have to download and install Blockstack on your computer and then log into the Blockstack browser and import your Onename.
I like to use the same userid everywhere. So this sort of thing is important to me.
If it is important to you too, then I suggest you take the time to do all of that in the next week.