Usually, a brand, celeb or influencer will include a tag, hashtag or other obvious visual clue within a post showing it's sponsored content.
RE: https://bsky.app/profile/did:plc:fctau3eedws5cdrvnv4k6n2q/post/3mow3w4r5s22x

Learning how to question and analyze are skills that must be honed and practiced. Educators must help train minds to look for flawed arguments, misuse of data, or outright lies so we can ensure that as students form their own thoughts on issues, they are grounding them in reality.