Hi!

I have not directly understood how batch trade differs from other two types?

It means to trade same item in multiple quantities, but how is that different from others?

Thanks in advance!

Basically it is "Single" with multiple sets.
Example: You have 30 name tags and description tags and you want to sell them together as sets. You can either make 30 trades of (1x name tag + 1x description tag) (30 trades, single) or 30 sets of (1x name tag + 1x description tag) (1 trade, batch).