You can rate songs directly on the song and album pages, without signing in or registration necessary. The better you like a song, the higher your rating value should be. Choose from the following options: 5 (masterpiece), 4 (great), 3 (good), 2 (average), or 1 (miss).
Please note that you can only rate each song once. Your individual ratings are stored on tweedlr.com and you'll always see all the ratings you've made so far.
When you view an album or song page, you will see a "tweedlr stars" rating. This is an additional automated song rating based on various criteria, such as the total number of ratings for each rating value of this song. The tweedlr stars rating is always relative to all other rated songs, so it changes every time a new rating is submitted. Also, the more high ratings a song receives the more stars is will get. The more low ratings a song receives the more stars will be substracted. All in all it's a rather complex process, but it shouldn't bother you.