Therapy is different for everyone. If you’re really curious, I suggest you try it out for yourself and see how it works for you!
In the meantime, here are some links that will give you an idea about how psychotherapy works from some various perspectives!
http://www.apsa.org/About_Psychoanalysis.aspx
http://jonathanshedler.com/writings/
http://www.psychologytoday.com/blog/the-couch/201011/does-talk-therapy-really-work
Photo Credit: Jean Scheijen