Your essay is a journey through your argument or discussion. Your paragraphs are stepping stones in that journey, and they build up your argument, point by point.
Paragraphs have several functions. These include:
You can think of paragraphs as mini essays, discussing a single idea. They will vary depending on your academic discipline and the nature of your essay, but here is a good basic paragraph structure:
You should differentiate your paragraphs by indenting them or leaving extra line space in between. Check whether your academic school has a style preference for this. Whichever style you choose, ensure that you apply consistently. Make sure your paragraphs are not too long or too short. Page-long paragraphs indicate that you are trying to make too many points in one paragraph, or perhaps not writing concisely enough. One-sentence paragraphs suggest you are not developing your points properly, and will be pounced on by the marker.