Research

More on understanding:

“A detailed study of a subject, especially in order to discover (new) information or reach a (new) understanding”

From https://dictionary.cambridge.org/dictionary/english/research

“Research is "creative and systematic work undertaken to increase the stock of knowledge".[1] It involves the collection, organization and analysis of information to increase understanding of a topic or issue. A research project may be an expansion on past work in the field. To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects or the project as a whole.”

From https://en.wikipedia.org/wiki/Research to read about it more.

You can also google – “research definition” to find out more.