When stains first occur, it is important to clean them with a low ph balance soap. Drying with a hair dryer is important. Once water has set and created a ring, the furniture may need to be professionally cleaned.
First you want to dampen the area with baby wipes, after dampening the area agitate the area with a clean cloth whilst blow drying the spot. If this is not successful repeat the process.
You may try cleaning your new microfiber sofa with soap and water, only to find that you've left rings of water on your fabric. This is not "dirt" that you just spread around that can be cleaned by using more soap and water.