How to merge cells in Google Sheets?

Question

Google Sheets

How to merge two cells into one with the condition that this very one cell will change its value depending on the changes in those two? And is it even possible to do this?

Answer 1

Merge cells and formulas of these cells.
For example, if the formula is in A1 and in A2, then the resulting formula in the merged cell is: =TEXT(TODAY(), "mm/dd/yy") & CHAR(10) & TEXT(NOW(), "hh:MM:ss") =TEXT(TODAY(), "mm/dd/yy")

Answer 2

In cell C2 we write:
=A2&B2