The key is how to prove that you have a strong writing ability, which needs to be supported by works and achievements.
You can leave your published articles, blog links, published article links, portfolios, personal accounts, etc. To prove your writing ability. First, write a good resume, focusing on your writing ability, resume first;
In addition to the interview, the interview should be prepared in advance to answer the following key questions:
1. Why do you want to work as a copywriter? (Investigating job hunting motivation)
2. What are your strengths? Why do you think you are qualified for this job? (Check whether you have the corresponding ability)
3. How did you write it? If you were given a topic, how would you conceive it? How to write explosion? (examining the way of thinking)
In fact, the company does not have such high requirements for recruiting fresh graduates, so if you have written skills and works, your resume can foster strengths and avoid weaknesses, and the interview can get to the point, you are basically at least 90% sure of winning this position.
Good luck!