A review should be free from grammatical, punctuation, or
stylistic mistakes, typos, inconsistencies, slang, and other
inappropriate elements.
Read through the text of your review, paying attention to the spelling of words, and punctuation marks. Look for typos.
Read your review aloud. This way you will be able to find parts
that seem unnatural, and fix them. Cut out all unnecessary words.
Check your language. Slang is only acceptable if you are writing a
jokey review on a comedy movie, for example. However, if you are
planning a serious review, words like “dude†can spoil the general
impression of it. Also, remember that explicit vocabulary is prohibited
under any circumstances.