If you want your build to be indexed with accurate informations, thereby improving the chances that players find your build on Build of Exile, you can use tags.
Hello build authors! Build of Exile does its best to index builds from the official Path of Exile forum and let you search them effectively, but guessing informations from a builds title/thread has its limits.
Tags are a way to declare informations about your build, put them somewhere inside your builds thread and Build of Exile will gather informations from them.