No, except maybe mechanically. The pattern of the antenna itself is
quite broad in the vertical plane. That is, its elevation pattern is
pretty fat unless it's a very long array, so tilting it in elevation
doesn't make much difference. The overall elevation pattern, except at
pretty high angles, is dictated by the ground reflection, which is
primarily determined by the height of the antenna above the ground.

If you're working satellites or otherwise line-of-sight where no
significant amount of ground-reflected signal hits the ground, then yes,
you want to point the antenna at the target. But again, unless the Yagi
is a very long one, its elevation pattern will be broad and you can be
pretty sloppy about the elevation angle.

A few minutes spent with a modeling program will illustrate these
effects clearly.

Roy Lewallen, W7EL

Murray wrote:
Well, is there any dis advantage?

Roy Lewallen wrote:

No.

Roy Lewallen, W7EL

Ron wrote:

Is there any advantage to tilting a beam antenna up or down to match
the anetnna's elevation angle of maximum gain to the angle of the
received signal? It looks like the answer is yes but not enough to
justify the trouble/expense (unless you are tracking a satellite).

Ron, W4TQT