Depending on where you are, you may be required by law to disclose that content is sponsored. In any case, the Affiliate Program requires you to be transparent about it. So make sure to inform your audience.
For instance: On Twitter a "#sponsored" or "#ad" hashtag can indicate sponsorship with just a few characters. On other social media (Facebook, Instagram, blog posts, etc.) disclosure is required as well (see suggestions by the FTC). In Youtube videos or other video content, disclosure must be made clear in the video itself (either spoken or in writing on the screen, presented long enough to be noticed, read and understood).
