i'll put it in simple terms:
- if your website is using 3rd party tools like Youtube video (yes that embed counts), comments, fourms, etc.
- You need data for legal reasons
- If data is needed for medical reasons.
- Using data as a tool for target ads.
If your website has anything on this then you need to have users agree to the cookie or use GDPR warning tools you sometimes find in sites. What you would be doing falls under the 5th rule because it will become atarget ad instead of building a game you never plan. No one asked you to build the targeted ad, you decided besed on data.