I mean when did the idea of SEO arise?

The year in which seo evolved was around 1990 to 1993. It mean seo is about 22 or 25 years old.

Thank for sharing.Nice to meet you.
See you again.

Thank you for the information but even though it was introduced 20-25 years ago,it is more popular from last few years i guess.

I agree with Bob, Yahoo came before Google but still Google is more popular than Yahoo and that too from 2005.

Yaa right seo is 20-25 years old.

Infoseek was founded in 1994 - en.wikipedia.org/wiki/Infoseek
Altavisa was founded in 1995 - en.wikipedia.org/wiki/Altavista

Those are some of the oldest popular search engines

From the starting of internet.