If you go to our Tips Tricks and Tutorials section of the forum and under Build Guides. (also available from the Home Page as a large green button) you will see a multitude of important guides listed in a row.
Here is the direct link: https://guitarpcb.com/forums/topic/pedal-building-guides-mandatory-reading/
Once there we have an Audio Probe Explained guide. This may be helpful depending on what you found on the internet.