Explain about marquee tag in HTML?

The Marquee tag allows you to have a scrolling text effect. Anything put between the opening and closing tags will scroll across the screen. A number of attributes that go with it and are useful include the following, which all use numbers.

Scrollamount - the amount of pixels of each movement
Scrolldelay - the amount of time in milliseconds between each jump. (1000 is 1 second).

Other attributes, with their values include:

Behavior - Slide (cones in once and stops), Alternate(bounces back and forward), Scroll (default)
Direction - Left, Right, Up, Down
Loop - (How many times to scroll)
Bgcolor
Width
Height


Generally the Marquee tag is not a very popular tag amongst professional web designers as it is seen to be very tacky and annoying after a while. So it is best kept for simple and fun sites.