College application essays do not need titles. In fact, most application essays do not have one. You may, of course, choose to add one if you feel like it adds value to the essay, but in most cases I would suggest not using one if not explicitly asked to provide a title.
The Common App essay you write there is sent to basically every school that you apply to. The Common App essay is 650 words, and contains 7 prompts to pick from...