When we create a table in Mathematica, can we keep it stored in the Noteboook for use when we reopen the notebook? I know I can export to a CSV or other filetypes and import whenever I need and I know that we can store data when we use Datasets with the button:
But once I reopen the notebook, I see only the table provided by the Dataset, I don't know how to actually use the data in there for other computations. I read some questions which seemed to deal with the question I am asking but none of them actually seemed to be about what I am asking about.

PersistentSymbolLook it up in the help. – Daniel Huber Mar 16 '23 at 08:32