Do wasps pollinate?

I had thought it was only bees which pollinate, but someone told me a few days ago that wasps also pollinate but just aren't as effective as bees.

Is it correct that wasps pollinate?

I'm just after googling and found this;
[broken link removed]

Wasps can be useful pollinators

Click to expand...

Thanks!

I would imagine that anything that could brush against the male and female parts of plants/flowers could pollinate?

Thanks ClubMan.