If you see a post that you think is important and newsworthy, Boost it.
Do not just Favourite it.
You need to get your followers informed.
If they think it is important or newsworthy, they can Boost it again. Then their followers may learn something.
If you see a Boosted post, and you agree, then Boost it again.
It is all about communication.
Do not stay silent.
There may be recursion here.