1. China

• WeChat
• Douyin (TikTok's counterpart in China)
• Sina Weibo

2. India

• WhatsApp
• YouTube
• Facebook

3. United States

• Facebook
• YouTube
• Instagram

4. Indonesia

• WhatsApp
• Facebook
• Instagram

5. Pakistan

• Facebook
• WhatsApp
• YouTube

6. Brazil

• WhatsApp
• Facebook
• Instagram

7. Nigeria

• Facebook
• WhatsApp
• Instagram

8. Bangladesh

• Facebook
• WhatsApp
• YouTube

9. Russia

• VKontakte (VK)
• Odnoklassniki (OK)
• YouTube

10. Mexico

• Facebook
• WhatsApp
• YouTube

11. Japan

• Line
• Twitter
• Instagram

12. Ethiopia

• Facebook
• YouTube
• TikTok

13. Philippines

• Facebook
• YouTube
• Instagram

14. Egypt

• Facebook
• WhatsApp
• Instagram

15. Vietnam

• Facebook
• Zalo (local social networking app)
• YouTube

16. DR Congo

• Facebook
• WhatsApp
• YouTube

17. Turkey

• WhatsApp
• Instagram
• Facebook

18. Iran

• Instagram (Note: Many social media platforms are restricted in Iran, but Instagram remains widely used.)
• Telegram
• WhatsApp

19. Germany

• WhatsApp
• Facebook
• YouTube

20. Thailand

• Facebook
• LINE
• YouTube

Facebook

• Description: The largest social network, where users can share posts, photos, videos, and engage in group discussions.
• Use Case: Personal sharing, business pages, advertising, news, and entertainment.
• Number of Users: Over 2.9 billion monthly active users.
• Growth Rate: Growth has slowed in mature markets but continues in developing regions.
• Geographic Reach: Global, with significant usage in every region except China, where it is banned.

YouTube

• Description: A platform for sharing and discovering videos, ranging from amateur content to professionally produced material.
• Use Case: Entertainment, education, product reviews, how-to videos, and personal vlogs.
• Number of Users: Over 2 billion logged-in monthly users.
• Growth Rate: Steady growth, particularly in markets with increasing internet access.
• Geographic Reach: Global, with localized versions in more than 100 countries.

WhatsApp

• Description: A messaging app that allows text, voice, and video communications, as well as group chats.
• Use Case: Personal messaging, voice and video calls, business communication through WhatsApp Business.
• Number of Users: Over 2 billion active users.
• Growth Rate: Strong growth, especially in countries like India, Brazil, and across Europe.
• Geographic Reach: Global, with high penetration in Europe, Latin America, Africa, and Asia.

Instagram

• Description: A photo and video-sharing social networking service known for its visual content, stories feature, and now, Reels.
• Use Case: Photo sharing, storytelling, influencer marketing, business advertising.
• Number of Users: Over 1 billion active users.
• Growth Rate: High growth, particularly among younger demographics.
• Geographic Reach: Global, with a significant presence in North America, Europe, and Asia.

TikTok

• Description: A social media platform for creating, sharing, and discovering short music videos, now expanding into a variety of content formats.
• Use Case: Entertainment, short-form video sharing, trends and challenges, influencer marketing.
• Number of Users: Over 1 billion active users.
• Growth Rate: Rapid growth, especially among Gen Z and younger millennials.
• Geographic Reach: Global, with a strong presence in Asia, the United States, and Europe.

X / Twitter

• Description: A microblogging and social networking service where users post and interact with messages known as "tweets."
• Use Case: News, entertainment, political commentary, personal expression.
• Number of Users: Around 330 million active users.
• Growth Rate: Moderate growth, with fluctuations based on global events.
• Geographic Reach: Global, with significant use in the United States, Japan, and Brazil.

LinkedIn

• Description: A professional networking platform for individuals and companies to post jobs, share content, and network.
• Use Case: Professional networking, job searching, B2B marketing, thought leadership.
• Number of Users: Over 774 million users.
• Growth Rate: Steady growth, particularly in the professional and B2B sectors.
• Geographic Reach: Global, with a presence in over 200 countries and territories.

Twitch

• Description: Twitch is a live streaming platform that initially focused on video game live streaming, including broadcasts of eSports competitions, personal streams of individual players, and gaming-related talk shows. Over time, it has expanded to include streams dedicated to music, lifestyle, and creative content, making it a diverse platform for live broadcasting.
• Use Case: While its roots are deeply embedded in the gaming community, Twitch's use cases have broadened to include live music performances, cooking shows, real-time art creation, and casual chats (referred to as "Just Chatting" streams). It offers a platform for creators to engage directly with their audiences through live content, fostering a sense of community and interactivity that is central to the Twitch experience.
• Number of Users: As of my last update, Twitch boasted over 15 million daily active users, with over 3 million creators streaming each month. This illustrates the platform's vast and active user base, which spends hours engaged with content creators of all kinds.
• Growth Rate: Twitch has seen substantial growth, particularly during periods of increased home confinement such as the COVID-19 pandemic, which accelerated its expansion beyond gaming into more varied content categories. The platform continues to grow, albeit at a rate that is influenced by global events, evolving user interests, and the increasing diversity of content on the platform.
• Geographic Reach: Twitch's reach is global, with a significant presence in North America, Europe, and Asia. The platform supports multiple languages and hosts creators and audiences from around the world, reflecting its broad appeal across different cultures and interests.

• WeChat (Weixin; China)
  
• Description: A multi-purpose messaging, social media, and mobile payment app.
• Use Case: Messaging, social networking, payments, and various services from booking appointments to hailing rides.
• Number of Users: Over 1 billion monthly active users.
• Geographic Reach: Primarily in China, with international usage among the Chinese diaspora.

• Douyin (China)
  
• Description: The Chinese counterpart to TikTok, focusing on short-form video content.
• Use Case: Short video sharing, live streaming, e-commerce, and entertainment.
• Number of Users: Over 600 million daily active users.
• Geographic Reach: Exclusive to China.

• Sina Weibo (China)
  
  • Description: A microblogging platform often described as a mix of Twitter and Facebook.
  • Use Case: News, celebrity updates, microblogging, and public discussion.
  • Number of Users: Over 500 million monthly active users.
  • Geographic Reach: Primarily China.

• KakaoTalk (South Korea)
  
  • Description: A messaging app that also offers various services like mobile payments, news, a gaming platform, and more.
  • Use Case: Messaging, voice and video calls, digital payments, and other lifestyle services.
  • Number of Users: Over 50 million active users.
  • Geographic Reach: South Korea, with some usage overseas.
• Line (Japan)
  
  • Description: A messaging app that has expanded into a social network including news, entertainment, and payment services.
  • Use Case: Messaging, voice and video calls, payments, and entertainment.
  • Number of Users: Over 84 million users in Japan, with significant presence in Taiwan, Thailand, and Indonesia.
  • Geographic Reach: Primarily Japan and other parts of Asia.