To tackle lagging or freezing issues on your PS4:
1. Close background applications and free up system resources.
2. Delete unnecessary game data or applications to free up storage space.
3. Check for system software updates and install them.
4. Rebuild the PS4's database by booting into Safe Mode and selecting the 'Rebuild Database' option.
5. If problems persist, consider initializing the PS4 (factory reset), but back up your data first.