What are web scraping tools?

Can anyone explain it. What are the uses, benefits and need!

Rlogical2020-02-25T07:17:54Z

Let's see here Best Web Scraping Tools:
Import.io.
Webhose.io.
Dexi.io (formerly known as CloudScrape)
Scrapinghub.
ParseHub.
VisualScraper.
Spinn3r.
80legs.

Sanjay2020-02-23T08:05:25Z

They look for specific data like scavengers...