The type of essay you write will depend on a number of factors:
Using clear essay structure will help the reader understand the purpose of your writing.
Linking words or transitions are the connecting words and phrases in and between sentences.
These words help the reader to find your next point easily.
Transitions are also needed for your reader to move from one paragraph to the next without confusion.
Transitions are not used to just embellish your paper by making it sound or read better, they are words with particular meanings that tell the reader to think and react in a particular way to your ideas.