A dependency manager is a software program that keeps track of all the necessary base programs that are required for a dependent program to run. A common practice in a software development life cycle is to perform unit tests by using a unit-testing framework; the unit-testing framework in turn might need some base libraries to be installed or there might be a few settings to enable the use of that framework.
These operations are often handled by writing up quick scripts, but as the project grows, the dependencies grow along with the project. Along the same lines, tracking these changes and making sure different teams working on the project get the relevant updates, which is done by scripts, is a tough task. By introducing a dependency manager, we will be automating the whole process, which adds consistency and saves time.