If you want a TV wall mount you need to first decide on the position in the room where you are going to mount your TV. This is quite critical in the TV wall mount decision process.
You might want to mount the TV high on the wall so you will need a bracket that will be able to tilt the TV downwards so you can get a good view of the screen. You may need to mount the TV in the corner of the room so you will need a cantilever bracket so the TV can be pulled away from the wall and pushed back again when needed. Alternatively you might have stud walls and need to use a ceiling TV bracket to get a secure fixing.
It is really important choose an appropriate TV wall mount depending on where it will be positioned in the room.