Maven is a Build Management Tool of the Apache Software Foundation and based on Java. With this tool one can provide and administer in particular Java programs in a standardised way. For more information about Maven have a look at Wikipedia. To install Maven into Your Eclipse environment You first have to go to the Eclipse Marketplace. Please select Help->Eclipse Marketplace,
To search for Maven type in "m2eclipse" and press the Go button. Now You will find the Maven Integration for Eclipse (m2eclipse). Press the install button.
Now the selected features are shown. Simply press the Next Button
You have to accept the terms of the license agreement. Select it and press the Finish button.
The software will be installed.
After the installation has finished You have to restart Eclipse.