TikTok Trends Soar in September with New Challenges, Algorithm Updates, and M2 App Launch

TikTok is buzzing this September with new trends, algorithm changes, and even a headline-grabbing app launch. The biggest viral loop right now is the “What do you do the whole day?” trend. Everyone’s spinning in circles, layering their videos with text overlays about mundane habits—think making coffee, checking Slack, raiding the fridge again, and then repeating it all. It’s wildly relatable, and listeners from pet owners to content creators are posting their own versions with that instantly recognizable “Na na na na” sound. According to Ramdam, this trend’s popularity relies on keeping it short and self-deprecating, which fits TikTok’s fast-paced vibe perfectly.

Another TikTok staple is the endless stream of dance mashups and challenge compilations. Dancefluencers and creators worldwide are mixing up the latest steps—September has seen a flood of new mashup compilations on platforms like YouTube, and names like Chala Vidz and One Challenge are leading the charge. Chala Vidz even encourages listeners to drop requests for future dances, keeping the challenge cycle alive and interactive.

Major news broke this week with TikTok rolling out a brand-new app called M2 on September 5th. The original TikTok app will be removed from U.S. stores, but creators are being reassured the switch will be seamless. TikTok’s official update puts the spotlight on this big move, which is sparking excitement and curiosity about what’s next for user experience and features.

Behind the scenes, TikTok’s algorithm just got a significant upgrade, as explained in a detailed breakdown by YouTube creator Rob Simon. The platform now rewards longer, high-engagement videos, so listeners aiming for growth need to reconsider posting ultra-short clips. Descriptions, hashtags, and even comments should directly reference the video topic—those who adapt have seen explosive follower growth in just a few weeks.

TikTok continues its upward climb in user numbers, hitting 169.7 million monthly active users in the EU by June 2025, reported by Musically.com. While Instagram still leads with over 280 million users, TikTok has been adding users more rapidly across Europe, reflecting its surging popularity and influence with Gen Z and Millennials.

And for creators, here’s something new: you can now schedule TikTok videos in advance. That’s a game changer for influencers juggling busy schedules and brand campaigns, as TikTok insiders are quick to note.

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