This Moodle local plugin implements the Twitter Summary Card in the course homepage: this type of card will give kind of preview of the content of your Moodle course by using the information provided by mean of:

• the course title
• the course description
• an optional image, being the first added in Section #0. Beware that this image should be publicly available regardless the user being enrolled into that course

If you want to deepen what a Twitter Summary Card is, more details are available at:

• https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary
• https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/markup