Write a report about database for social media, Twitter website, or social media

Write a report about database for social media, Twitter website, or social media company from your country (my country is Taiwan) if possible. The report should a minimum of 1000 words without counting the references
Please observe how this site works. After your inspection/study, explain any aspects and specifications of its database, such as about its database software name, about the number of users, and any general database knowledge, e.g., its database use/functions, its model, structure/ network configuration, benefits to its users and to the company, problems of access/operation /maintenance, and other knowledge/understanding that you gain from our class.
(cover and discuss all the points above)

Please also show a simple database similar to twitter database using ER diagram, similar to L2 contents – pdf file attached (check the last page of the pdf attached for the twitter ER diagram).

NOTES:
1. Include the number of words in your answer at the beginning of your report
2. Enter sources for your writing in the Reference part. At least 4 reputable references. (APA style)