The phrase "key principles" refers to the most important rules or ideas that guide a certain topic, process, or belief. These principles act as a foundation or basis for understanding and making decisions in that particular area. Full definition
This is an excellent primer on key principles of value investing, written in an easy to understand manner that almost anyone can pick up and understand in the first reading. (valuestockguide.com)
For now, here are a few key principles in the selection process. (dailytradealert.com)
To develop the recommendations, we reviewed the best available international research and consulted experts to arrive at key principles for effective literacy teaching. (educationendowmentfoundation.org.uk)