While most new additions in the Software Wizard database have been blotted for profanity, it is almost impossible to completely remove all language from certain songs. When you see a song with an advisory, it means the 1-minute sample has language in it that may be offensive to you. This is how the ratings work:
Profane Language: This sums up most swear words, and generally unaccepted sexual words
Offensive Language: This division is more broad, as it can cover sexual and racist phrases or remarks, words that may be found offensive, or put downs and encouragement of unappropriate activities.
Profane & Offensive Language: This advisory means that the song contains both profane language and offensive language.
General: This means that the song could be completely offensive, which can include lyrics, sound effects, tone of voice, threats, beat, etc. As these songs are generally unfit for public listening, this rating will probably rarely be seen.