Think of your phone as a high-security building. The operating system (Android) is the interior. The bootloader is the security guard at the front door. By default, this guard is instructed to only let in people approved by the management (Motorola and Google). It ensures that the software running on your phone hasn't been tampered with.
Before you celebrate, understand the trade-offs:
On your phone:
So, you own a Motorola smartphone. It’s likely a solid device—known for clean software, excellent battery life, and great value. But if you’re reading this, you aren't satisfied with "stock." You want root access, custom ROMs like LineageOS, or perhaps a custom kernel to squeeze out extra performance.