1.Image

    The web is not just about text,it is a multi-media extravaganza and the most common form of sparkle is the image.

 

2.<img/>

attributes:src 

width height :nesessay 

alt alternative description

 

3.

JPEG:iphotographs

GIF:solid colors,icons or logos

PNG:versatile images in more complex design

 

image qulity vs image size