During or after many online courses, you can join social media groups and/or receive emails from course providers or the course creators. Most course provider emails are marketing type correspondence, encouraging learners to enroll (and hopefully take the paid certificate option) in new or popular courses. These emails also often extol the benefits of online learning, particularly for your career prospects. Emails sent from course creators are more likely to contain information on topics or resources of more specific interest to that particular field.