In addition, they allow the readers to transition from one topic or point to another. They enhance the understandability and logical organization of an article by helping the readers know the relationship of the previous and following sentence and/or paragraph in the paper they are reading.
As the term implies, compare and contrast transition words are transitional phrases/words that show comparison and contrasting relation of two ideas. They are also used to emphasize negative and positive ideas. For you to have a clue on what exactly are they, here is a list of the most common contrast and compare transition words and phrases that are used in everyday writing and speech.