Tags\Keywords Optimization
 

i am on a wallpapers blog job ... when i produce leech pages i placed in the tags about that image in meta details ... but i also have to inform that these are wallpapers ..so what is the best way to do it ...

Don't understand your question please elaborate your question in more details. If you are asking about image alt or title tags then it's best practice to use keywords in your image alt tags and title tags. Never do keyword stuffing!

Tags means, you want to tag any particular person and keywords is your target.