Using a recent thread as a base, I drafted a Wiki article on this question that we actually get pretty often:
https://mxlinux.org/wiki/system/add-ppa-repository
It's needs some TLC when people have time--thanks.
Wiki draft on PPAs
Wiki draft on PPAs
Production: 5.10, MX-23 Xfce, AMD FX-4130 Quad-Core, GeForce GT 630/PCIe/SSE2, 16 GB, SSD 120 GB, Data 1TB
Personal: Lenovo X1 Carbon with MX-23 Fluxbox and Windows 10
Other: Raspberry Pi 5 with MX-23 Xfce Raspberry Pi Respin
Personal: Lenovo X1 Carbon with MX-23 Fluxbox and Windows 10
Other: Raspberry Pi 5 with MX-23 Xfce Raspberry Pi Respin