As far as choosing impromptu speech topics goes, they should be debatable, argumentative, and neutral. The first two are very crucial. In addition, you should choose a topic that will boost your confidence. After all, there's no point in delivering a speech you don't like. You should be prepared. It's better to choose a topic that you'll be comfortable delivering in front of an audience.
In addition, impromptu speech topics help you build your confidence and quick-thinking skills. Even if the speech is short, it still requires structure. You should practice impromptu speech topics often in order to develop your confidence. They should also be memorable. They should be based on your own personal experience, feelings, or interests. You should make a speech that reflects your personality and the audience's needs.
Remember to be unique. College admission officers will look at many aspects of your application, so don't copy the essay of someone else. Be authentic and original. Recounting an event, for example, may allow readers to make their own conclusions. Remember, admission officers will use everything to evaluate you. They know how to read your words without telling them explicitly. So, it's vital to be yourself, rather than an impersonation of a popular figure.
Remember that you're writing an academic essay, so use first-person pronouns sparingly. The essay's hook is the first few lines, and it's important to capture the reader's interest. Once the hook has hooked the reader, proceed to develop the main ideas with at least one paragraph. If possible, use examples to illustrate your points. Incorporate anecdotes into the essay, but avoid writing in the first person.