What is R-square value in research? How to explain a low R-square value in research??

In this video, we understand what is a r-square value and how do we explain its low value if obtained in a research study. The use of examples from my own research will aid in understanding. I also present multiple views of this problem to provide a holistic understanding of the topic. I also show how to write an explanation of a low r-squared value. 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