Описание тега maven-central
The Official Maven Repository, hosted by Sonatype.
Maven Central is the official Apache Maven repository. It is hosted by Sonatype, for Apache Fundation.
It has moved several times from central.maven.org, repo1.maven.org and many other. The official address is now http://search.maven.org/
When using a Maven repository, it is important to be aware about MavenCoordinates.
The official guide about How to upload to the Central Maven repository may also come to help.