Freestyle rap is strictly speaking rap which is done in the moment at pure free flow, with no previously composed lyrics, and reflecting a direct mapping of the mental state and performing situation of the artist. It is similar in this sense to improvisational music or acting.

Genuine ability to freestyle is so rare however, that there are numerous artists who keep to the spirit of freestyle by basing their set on the situation and mental state, but who have a ready supply of prepared "freestyle" elements they can use as filler, or even around which they can build their set.

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