questions about Zenfone 3's inbuilt security App

Big Boar

so Zenfone 3 has inbuilt security app called "mobile manager". it cleans, boost, removes virus etc. does it provide all care you need for your zenfone 3? or do you need another similar app like CM Security? according to reviews, mobile manager does a great Job for your Zenfone 3. so i wonder.... also i just got notice that i got virus by visiting a Manga site telling me that it will damage my SIM, delete contacts and damage my phone. what should i do when this happens? i love my zenfone 3 and seeing this is Vexing X_x