pandas.DataFrame.is_copy has no description in the docs

[allComputableThings]

Code Sample, a copy-pastable example if possible

https://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.is_copy.html#pandas.DataFrame.is_copy

Problem description

It isn't clear what this property tells -- there's no documentation. When does it become true, and when does it become false?

Expected Output

Output of pd.show_versions()

[jorisvandenbossche]

Thanks for the report. This is a duplicate of #18799, which initiated the decision to deprecate is_copy altogether (although there is still some discussion about that), see the linked issues in that issue.