You should validate your maps regularly to make sure that your topics are valid, and all of the relationships between them are working. Changing one topic, image, or piece of metadata may create errors in references that rely on them. You may not discover these problems all at once. Validate your map to catch all of these kinds of problems. The longer you wait between validating your maps, the more difficult it may be to detect and correct any errors you find.
To validate a map: