The best social media platform for advertising depends primarily on the type of audience you want to reach with your products. However, In 2023, Facebook is the number one social media platform that marketers are focusing on, according to a study by the HubSpot blog. When asked which social media platform they plan to invest the most in for 2022, 25% said Facebook, 20% said YouTube, 16% said Twitter, and 15% said Instagram.