Whenever you're sharing your affiliate links, you must use a disclosure, but that disclosure is different in different places. For example, the disclosure you're required to have on a website is different then in a video, or if you share an affiliate link on Twitter.
Rather than reinventing the wheel, refer to the FTC directly for their official guidelines on their website here.
Bottom line: always clearly tell your tribe that you're going to make money if they buy through your link. When in doubt, check the FTC website for a suggestion on what format you should be using!