Where should we use MongoDB

   *  Mobile and Social Infrastructure.

   * Big Data.

   *  MongoDB has built in special functions, so finding relevant data from specific locations is fast            and  accurate.

   * Your Data Set is going to be big (starting from 1GB) and Schema is not stable.

    * You need to grow big i.e Databases scaling is hard (Ex In any RDBMS table performance

        will degrade when crossing the 10-15GB per table). If you need to partition and shard your 

        Database, MongoDB has a built in easy solution for this .