As another little tip from the inside, transition words are excellent cues on standardized tests. They often tell you what will be coming next (either positive or negative), and indicate a change. Furthermore, they are great words to stick into essays in high school and college. Teachers look for these words, as they indicate structure within an essay. As they are necessary to the continuity (and coherence) of an essay, they will demonstrate a firm grasp of a topic. If you use these words, then you know you have structured a strong essay, as you are building on an issue or are comparing two different issues well.