I am thinking of buying a beam antenna for HF.
I have been told that some antennas have earthing straps and some dont.

The antenna I have seen is a tribander with traps for 10-15-20. It has no
earthing strap on.
If I were to put an earthing strap on to the braid side first to the pole
then earth the pole.

Will this A, give me protection against lightning and B, improve signals
recieved.
Will there be any other effect. ie: swr etc.

I understand the middle element is a driven element, with an insulator on
and there is a director and reflector.

sorry if its a stupid question !!!