If u will choos no background process your phone will revert in 1995 Nokia mobile. It's will stop all types of notification update and prosser data transmission, your phone will only perform for taking a call or messages from your mobile number service provider. Keep your phone in standard background process until it's not become 2 year old and performing very slow, But u should keep at least 1 or 2 background process to be in touch with smart and latest information,
But there is one another best option is available that's, just select stop all backgrounds activities, it's will safe yr battery life and also prevent heating problems.