I really don't understand and am very new to this.

I opened a Coinbase wallet.  I then bought Etheren.  I then purchased SCR on the Scrinium website.  I now have the SCR I bought when I log into Scriniun - it shows the amount of coins I purchased.

I have just opened a myEther wallet.  

My question is - What is the myetherwallet for?  Are my SCR I bought supposed to show up on myetherwallet - if so, what am I supposed to do?

Thanks