Piwheels automates building Python wheels (pre-compiled Python packages) for all of the projects on PyPI, the Python Package Index, using Raspberry Pi hardware to ensure compatibility. This means that when a Raspberry Pi user wants to install a Python library using pip, they get a ready-made compiled version that[he]#039[/he]s guaranteed to work on the Raspberry Pi. This makes it much easier for Raspberry Pi users to dive in and get started with their projects.

Source: LXer – How piwheels will save Raspberry Pi users time in 2020