Answer: They are protecting them as the usual insects and animals do
Step-by-step explanation:
All of the animals have the same sense for the ones that they are carrying and they are all very protective when it comes to their babies and so are spiders.
Something interesting about these insects is that they are laying a lot of eggs, about 1000, it depends on a species but they can lay between 2 and 1000. Female spiders are very protective, they are making a silk bed for them and they are covering their babies like that so they can be protected from everything. She is guarding her babies until they are ready to function. The fact that is very interesting when it comes to spiders is that those babies are eating their live mother after that.
Scientist have found out that some spiders do have feelings, and they do feel love for their babies as the mother does.