Container is a standard way to package the code of an application and its associated dependencies. Containers are aimed at solving portability problems (i.e. those that occur when moving software from one environment to another) in an efficient and effective manner. Container management is a key part of containerization and reduces the complexity of interdependent systems by facilitating container distribution.
If you are not clear on what containers are, feel free to read our article about containerization to get more information.