Wasps are under nature protection, although humans usually hate them.
During summer, they invite themselves to our barbeques because they need meat to feed their larvae. In late summer and fall, they invite themselves to our coffee tables to get a porting of sweet cake, ice cream, or fruits. Although the larvae need meat, the adults feed themselves from pollens, honey, and overripe fruits. Thus, our cakes and especially plum cakes fit perfectly in their nutrition ☹️ and we have them around us each day with nice weather.
On hot days, they also come over to ponds, poodles, and bird baths to fetch some water for their larvae. These are leaves of water lilies in a pond. When there is a bit of water on such a leaf, they use it. If not, they have to stand on a leaf and drink directly from the pond’s water.
Soon, their breeding season is over. Then, the adults (all females) are unoccupied and roam around to find some sweet food and the humans are annoyed again.
Because of their importance to nature, they are protected. In case, you find a nest, you have to leave it alone. There are very high fines when a wasp nest is destroyed. In case, the nest is endangering humans, they can order a beekeeper to relocate the nest carefully.