If OBS says dropped frames
Start with the connection. Use Ethernet, lower video bitrate by 1000 kbps, stop cloud backups, and try a different ingest/server region.
If OBS says skipped frames
The encoder is falling behind. Switch to NVENC, Apple VT, QuickSync, or AMD hardware encoding when possible. If you are already using hardware encoding, lower FPS before lowering resolution.
If OBS says rendering lag
The scene is too heavy for smooth rendering. Cap game FPS, remove expensive animated overlays, reduce browser sources, and lower output resolution if needed.
Useful next step
Use the OBS Settings Wizard to produce a safer baseline, then record a 60-second test before going live.