How do spiders do webs?

Glands and structures called spinnerets located at the rear of the spider, apart form spitting spiders where the sticky web is produced at the front.

To catch there prey. So they have somewhere safe to be and protect them from enviromental factors that could harm them such as strong winds

spiders make spiderwebs so that when a fly flys by it flys into the web which is very sticky so the fly cant get out. the spider then wraps it up then sucks its blood for dinner.hunting spiders dont...

Yes and no respectively.

from the silk from theyre spinerettes