Barbed hooks differ from barbless...

Barbed hooks

Barbed hooks differ from barbless hooks in that they have a tailstock which, once penetrated into the fish's mouth, prevents the hook from escaping.

The hooks with barb are used by those fishermen who intend to retain their catches, in fact the use of these hooks can cause lesions to the mouth of the fish when they are extracted. However, it is possible to push this barb so that you can choose from time to time how you want to fish.

Vogel