How can i create banner in Wordpress site?
 

This will place the banner you want into the sidebar of your WordPress site. If your theme does not support widgets you'll need to add your banner code directly into the sidebar.php. You can edit this file from the Appearance -> Editor part of your WordPress admin page.

check on this link http://www.siteground.com/tutorials/...ss/banners.htm. it has complete information of wordpress banner.

Steps to change the Header banner
Log into the WordPress Dashboard.
Navigate to Appearance > Header.
To upload a new banner, click the browse button. Find your banner on your local computer and click the upload button. ...
You will be taken to the Crop Header Image page. ...
You will see the preview of the site with the banner.

If your theme does not support widgets you'll need to add your banner code directly into the sidebar.php. You can edit this file from the Appearance -> Editor part of your WordPress admin page.

Avartan Slider is a responsive WordPress plugin to create stunning image slider and video slider for your WordPress website. The slider uses auto generated short codes that makes it easier for the users to add it to the custom location.

It has lots of another features are:

1) Unbelievable content styling options

2) Easy Import Export Slide and sliders

3) Video content is also supported with advanced features

4) Very Easy to use Graphical Interface

5) Huge collection of loaders and patterns

You can include the banner in WP pages & posts.

You can include the banner in WP pages & posts.