Question about the application process as an exchange student

I'm currently applying for an exchange semester at Aalto, and I was hoping I could get some advice here. I have everything complete, all documents uploaded, and details filled in. However, the field for "Briefly state your motivation: why would you like to study at Aalto*" is a bit confusing for me.

I was asked to upload a bunch of files (CV, English certificate, learning agreement, etc.) which included an essay/letter of intention. They recommended us to write around 200-300 words. I did and all my documents were accepted through my uni's side. Got an email from Aalto to start the application from their side late yesterday and got the same requirements for the most part. uploaded everything, and now I'm at the aforementioned field but I don't know if I should copy and paste my 300-letter letter in the small box or if I should summarize it into a brief paragraph (it's around 3/4 of a page).

I'll ask some people here for advice but if anyone studying/teaching at Aalto or any current or previous exchange students could give me some advice it'd be really appreciated. Thanks in advance and thanks to anyone who read this.