making sure your potential employers know about your strengths is kye tosuccess?

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some people think making sure that influential people or potential employers know about your strengths and accomplishments can help you succeed,if you do not do this ,you won't have a successful life. the above is a topic given by my english teacher,i don't know where to start and how to start,would you please give me some advices and your own viewpoints?thanks in advanceO(n_n)O~i appreciate you all