In a cell you can put:
=Today()
If you are talking about on printed pages, there are options to insert the date into the header and/or footer areas if you go into Page Setup before printing.
I suppose the current worksheet would be the one you currently are working on. It is the active worksheet.
This question is not clear. In Excel data is displayed on a worksheet.
Formula wooksheet
=NOW()
The NOW function
That is not a question but the statement is correct. It opens a workbook and you see a worksheet in it that you can start working in.
To display today's date in a worksheet, you can use the TODAY() function in Excel or Google Sheets. Simply type =TODAY() into a cell, and it will automatically show the current date, updating each day when the worksheet is opened. This function does not require any arguments and is useful for tracking daily records.
The status bar.
The benefit of linking a chart from an Excel worksheet to a Word document is that the chart data will always be current. Excel is spreadsheet software from Microsoft.
The MIN function.
Datasheet view
The formula bar.