If you want to run a paid advertisement that appears across a wide variety of websites, videos, and mobile apps, your best choice is:

Google Ads (formerly Google AdWords) allows advertisers to display ads across Google's vast network, which includes search results, YouTube, Gmail, and a multitude of websites and mobile apps that are part of the Google Display Network. This extensive reach makes it the ideal choice for broad ad distribution. Twitter Ad Cards are specific to the Twitter platform. Facebook Ads Manager primarily targets Facebook, Instagram, and their audience network, which is extensive but doesn't encompass the same breadth of third-party websites and apps as Google. YouTube's Video Ads Manager is specialized for video ads within YouTube and its partner network, not a wide variety of general websites and apps.