Spiders, good or bad

[mark]

Hi Guys

Can anyone explain how spiders work ( no not the insect type )

the ones like msnbot, google,yahoo

Are they good or bad?

[Ray10]

Hi Guys
Can anyone explain how spiders work ( no not the insect type )
the ones like msnbot, google,yahoo
Are they good or bad?
Web crawlers or spiders are web robots that recursively gather web-page information, as does the bot used by Google ("GoogleBot").
Mostly just gathering info for search engines...