Sprites Site speed Optimization
What is Sprites ?
Sprites is the method to reduce http request to download multiple images .
Normally browser downloads 2 images simultaneously.
So is you have 20 images , it download 2 at a time, and this will slow down the site loading speed.
In sprites you can put all small images to one gif/png [...]

Site Speed Optimization
What is Site Speed Optimization ?
Site Speed Optimization is optimize site to load faster in any browser.
When we make the site loading fast , web site visitors are happy to browse the site.
Also this helps to get good rank in SEO also.   Search engine loves fast loading sites and give high ranks to [...]