Lag is a common issue with TikTok, and several factors can cause it. Some of them are written below:
Out-Dated Device: When you're having difficulties playing videos on any platform, the first thing you should look at is your device. Using an outdated or low-end smartphone, the TikTok app may struggle to perform properly, resulting in video blurring and lagging.
Apps in Background: While using TikTok, you may have other applications running in the background, putting an additional burden on your device and causing it to overheat or collapse.
Unstable Internet: Another major cause of TikTok video buffering or lagging troubles might be an unstable Internet service. For the TikTok videos to operate, load, and play properly, you'll need a steady Internet connection with no significant downloads or background activities.