What should be the keywords of my site?

What should be the keywords of my site http://www.fotoholder.com???

 

What exactly do you mean? Every word/phrase on a page is a potential keyword/keyphrase.

 

I mean what should I submit to directories and in coding of PHP is keywords?

 

http://tools.seobook.com/general/keyword/

 

thanks for consulting a site

 

check thi link:https://adwords.google.com/select/KeywordToolExternal
keyword must be non-competitive,relevant.
image recognition,image,image processing,logos.

 

I guess there's no other keywords in your site other that "fotoholder".