The way that content marketing works is rather straightforward, but the implementation is far more difficult. Why? It takes a considerable amount of sweat equity to wield this strategy. Not only do you need to write unique anchor content on your website or blog, but you need to write unique content to market that anchor content via authority sites.
The General Data Protection Regulation (GDPR), which took effect on May 25, 2018, is a set of regulations governing the use of personal data across the EU. This is forcing some affiliates to obtain user data through opt-in consent (updated privacy policies and cookie notices), even if they are not located in the European Union. This new regulation should also remind you to follow FTC guidelines and clearly disclose that you receive affiliate commissions from your recommendations.
Know the legal requirements. Most visitors will probably understand that advertisements lead to your personal compensation, but if you write a review or use an in-text link as a recommendation, you must explicitly state that each purchase using that link can generate revenue for you. This isn't just good business: it's also required by law. If you don't disclose affiliate or revenue-generating links, you could face legal and financial penalties.