How Search engines are related to the SEO industry?

[davidabel]

Hi..
Can anyone tell me, how search engines are related to SEO industry.??
And also explain how crawling process is done by Search engines.??

[mesasa]

Google crawler is an program(code) who read your web page. Crawler go on your web-page as a chief guest, crawler can stay on your web-page for few second or can stay for few minute, it depends.hen crawler take an snap shot of visited page(when you check page cache then this snap shot appears to you including date of crawl). Crawler index that page in the google repository.