There are three things I would like to revise here. First, "menyediakan" has an exact meaning with "memberi". The latter word is shorter, so I believe that it is better. Second, the word "optional" cannot be translated as "tambahan" (additional). If something is optional, that means it is an extra to what is already available. The appropriate word should be "opsional". Finally, the translator use the word "group" instead of "channel". As we know, group and channel are two different parts, so we should not treat those to terms the same. They are not used interchangeably.