While Adobe has since moved to much newer versions (like Premiere Pro 2024+), the 11.0.1 "piece" was known for fixing:
The 11.0.1 update was specifically issued to fix issues reported in the version 11.0 launch. Users typically access these updates through the under the "All Apps" section. Core System Requirements Adobe Premiere Pro CC 2017 11.0.1
Windows 7 (SP1), 8.1, or 10 (64-bit); or macOS 10.10 or later. While Adobe has since moved to much newer
Dedicated card with at least 2 GB of VRAM (e.g., NVIDIA GeForce GTX 1080) for hardware acceleration. Key Fixes in 11.0.1 Dedicated card with at least 2 GB of VRAM (e
If you are looking for the technical "piece" (patch or update) for , it is primarily a maintenance update released to address critical bugs and improve stability for the initial 2017 release. Release Overview
Accurate hardware for Premiere Pro CC 2017 and After Effects
Crashing during playback or when using specific third-party plugins.