Search Engine Optimisation or Search Engine Optimization?

[Tommy]

Hello,

Search Engine Optimisation or Search Engine Optimization, which is correct ?
I saw 2 these terms more times on the more websites, why do they use "Search Engine Optimisation" in any cases.
and what are the main differences between Search Engine Optimisation and Search Engine Optimization?

Can you explain for me?

 

[Alex Thompson]

Hi... According to me Search engine Optimization... Hope I'm correct...

 

[mugwande]

The proper word is search engine optimization but not "search engine optimisation" this one is very wrong.