Adsense account not approved

I have applied to adsense account but they rejected it by stating that
Valuable inventory: Scraped content.
Can anyone plz help me in that.
My website niche is Free udemy courses. I have shared free udemy coupon and courses on my website. and I have used udemy course content on my website (eg requirements, what you will learn etc).
Did google considers it as scraped content. As I can not write unique content for every free courses I shared on my website. My competitors also does the same but they have adsense on their website.
Any suggestion is highly appreciated.

If it would be only that easy.. I wouldn't suggest you apply for adsense before you re-writing all of your content, start putting more work in your website.

Step2: I only suggest copyscape -> Check all of your content (after you done re-writing/writing/fixing). Now, it doesn't have to be completely 0 plagiarism, sometimes it shows you some matches but they're just terms that couldn't be avoided. Anyway, you have to apply to adsense after you done with everything + wait at least 1 week/2 for the complete index. Or you can request that to the GSC(google search console)

Say NO to copy content if you want to work with Google adsense.

Thanks everyone for you response.
I already write unique content for my homepage, category page. I published 5-6 unique article in my blogs section. but I cannot write Unique content for every coupon post I published. Daily I have published 15-20 udemy free courses on my website and I cannot change the the content, because the content like course description etc has to be same like udemy.