.use allows to create light section for structuring your code with local variables without creating a more heavier function, object or file which breaks linearity and makes harder to read and understand your code.
do bind body make object! collect [ forall locals [keep to set-word! locals/1] keep none ]
count: 10 .use [count][ count: 0 count: count + 1 print count ; 1 ] print count ; 10