Master page and content page in Asp.net

    -> Master page enables you to share content among multiple
        content pages in your web site.

    -> Master page creates common page layout for your website

    -> Create Layout ones in a Master page and apply this layout to
         multiple content pages

    -> Advantage of Master page , You can make your website easier
        to maintain.extend and modify

    -> You can also Add multiple Master page in your website

    -> Master page extension name is .master

    -> You can take multiple contentplaceholder in one master page
        as your requirement