Usually it's not recommended or necessary. The only times I can think of that it would be worth doing is when either you've used an extremely flocculant yeast and let it sit for a long time (like maybe doing a lager), or if you made an extremely high ABV beer and might have overstressed the yeast.
I did add a pinch of fresh yeast when I bottled my last lager, because I lagered it at 34 degrees for months and the beer was super clear. But I added maybe 1/4 of a package to my priming solution, dissolved it and then racked my beer into it.