__Rhyme:__ Rap is a form of poetry, so it is important for the lyrics to rhyme. The most common rhyme scheme is AABB, but there are many other variations.
__Flow:__ The flow of a rap is the way the lyrics are delivered. Rappers use different techniques to create a unique flow, such as varying the speed of their delivery, using different vocal inflections, and adding pauses.
__Wordplay:__ Rappers often use wordplay to make their lyrics more interesting and engaging. This can include using puns, metaphors, similes, and other figures of speech.
__Delivery:__ The delivery of a rap is also important. Rappers need to be able to project their voices and connect with the audience. They also need to be able to use their body language to convey the emotion of the song.
__Subject Matter:__ Rap songs can cover a wide range of topics, from personal experiences to social issues to political commentary. Rappers often use their music to express their thoughts and feelings about the world around them.
__Audience:__ Rap music can appeal to a wide range of audiences, from young people to adults. Rappers often tailor their lyrics to their target audience, using language and slang that will be familiar to their listeners.
Rap is a diverse and ever-changing genre, and there are no hard and fast rules that apply to all rappers. However, these guidelines can help you get started if you're interested in writing or performing rap music.