These are sites where most of the terms, jargon and product management specific terms are listed. You can visit them and get to know more about what these terms mean and how that translates into the work that you do or would be doing as a PM.
Glossary of Product Management Acronyms and Jargon
This article helps you with terms that are used on a day to day basis
More to come...
Product Management - KPI and Metrics
This section is taken from one of the super repos that contain everything you would probably need for you to break into product management and beyond