maybe this article can explain about MEWconnect
https://medium.com/myetherwallet/mobile-crypto-wallets-explained-the-matryoshka-edition-65d4da37c0c0
also go to this link https://beta.myetherwallet.com and go to FAQ sections
read this too https://kb.myetherwallet.com/mewconnect/mew-connect-user-guide.html