What's tag <svg> ? What for used this tag?

Answer 1

SVG is a language for describing 2D graphics in XML.
SVG is XML based, which means that every element is available within the SVG DOM. You can attach JavaScript event handlers for an element.
In SVG, each drawn shape is remembered as an object. If attributes of an SVG object are changed, the browser can automatically re-render the shape.

Answer 2

thanks

Answer 3

SVG stands for Scalable Vector Graphics. It's mainly used for drawing vector based shapes in browsers