Is plugin support shortcode feature as I can display particular slider in any widget area?

Yes, Avartan Slider provides shortcode feature as well as php function feature. You can write it in content area and you can see your favorite slider on your website.

What is the best point with Avartan Slider?

Avartan Slider gives you user friendly admin panel, wide variety of default options that required for all users and third party video integrations like youtube, vimeo and HTML5 video support.

For which purposes I can use Avartan Slider?

Avartan Slider is a multipurpose responsive slider as you can use it for any wordpress website to dispay your message to website vistor using content slider, animated slider, video slider, form slider or combination of all.