Watermarks are special collections of data which are embedded into the class files using steganography techniques, used for the purpose of identification. This data can contain any kind of information, but usually it is used for identifying the owner of the application. For example, you can generate a separate build for every client and place the data concerning the client himself in it. And if someday you find your product on a warez site, you'll be able to reveal (with the help of Allatori's utility) which of your clients has helped the pirated copy of your application to be spread. It must be emphasized, that watermarks are admitted to be verification of copyright in the court. So, because Allatori has all the functionality to work with watermarks, you can feel secure, because watermarks are considered to be a great weapon against pirates and those who help them.