1. Avoid casting a big net. Target location is not clear. No matter what advertising company or position you see, you should submit your resume. Don't write too many empty words in the cover letter. 3. From the perspective of copywriting, the cover letter should be bold and creative. 4. A cover letter can reflect your personal qualities and pursuits, and you can see where your core competitiveness lies. 5. Unique vision, fluent writing and innovative content are all platitudes, which HR won't want to see. 6. From your cover letter, you can see which position in the advertising company is suitable for you.