What is the point of merging a document?

If two people are working on the same document at the same time, you will end up with two conflicting revisions. Both may have started from the same base version of the document, but through their separate work, they have created two different, revised versions. The point of merging is to combine the changes of both contributors into a new, complete revision of the document. The merging process compares what was changed in each version of the document, and tries to automatically create a new document combining all changes from all editors. Manual intervention may be necessary, if, for example, two authors changed the same sentence in different ways.