關於「Instagram total user 2021」標籤，搜尋引擎有相關的訊息討論：

Instagram users worldwide 2025 - Statistawww.statista.com › instagram-number-of-global-usersNumber of monthly active Instagram users 2013-2021 - Statistawww.statista.com › statistics › number-of-monthly-active-i...Instagram Statistics: Key Demographic and User Numbers - Backlin