Hashtags on Instagram are used to categorize and organize content and make it more discoverable to other users. When a user adds a hashtag to their post, it becomes connected to all other posts that use the same hashtag. This allows other users to easily find and view all the posts that are associated with a particular topic or theme.
Instagram announced this year's most used tags. Among the most used tags, it seems that users are more into social events and follow them more frequently. The tags 'Mahsa Amini', who was killed in Iran by the morality police because she refused to wear a headscarf, and support for 'Ukraine' are among the most frequently used of the year.