MongoDB is mainly used for huge datasets which are usually considered to be big data. It is used to power high-volume applications such as social networking sites and most web applications.
It was first developed by 10gen in October 2007 when the company shifted to an open source model. It has been adopted by a number of other companies in powering their web back ends. These include eBay, SourceForge, The New York Times, Craiglist, FourSquare, Stripe, MetLife, MTV and SAP just to mention a few.
MongoDB is used to power applications running on the internet that are accessed by a huge number of people at the same time. These applications have huge datasets to work with and MongoDB comes in very handy in such a scenario. There are also a number of mobile applications that make use of a MongoDB backend in order to run the app.
These apps makes use of a database on the backend in order to store the users data such as login credentials and the data they use within the app. Blogging platforms are also not left behind with a number of them such as YVision making use of MongoDB as the database for their blogging platforms.
Secure applications such as those that are used in online banking also make use of this database in order to process the huge number of transactions easily. The fact that MongoDB is free to use makes it a natural choice for most organizations. One does not have to pay for the database as long as they do not modify the core source code of the database. In case such changes are made, they have to be reported back to the vendor. Apart from that, MongoDB is free and open and anyone can use it to power their applications.