Ram Plus

[MAI1203]

what is the benefit of this feature If anyone knows about this, please tell in detail what this feature is used for. 

[jshsvck]

Simple detail:

When your ram is maxed out from applications or tasks it uses your free memory as your 'extra ram'

[TMan296]

It allows users to expand their available memory. In the case where you may have 12gb it's not required but if your phone 4gb or 6gb you may opt for more.