Introduction
Formulas in Google Sheets help you do math and get answers automatically. Cell references tell the formula which numbers or text to use. This saves time and avoids mistakes when you change data.
When you want to add numbers from two cells, like adding prices in a shopping list
When you want to multiply quantities by prices to get totals in an invoice
When you want to subtract expenses from income to find profit
When you want to combine text from different cells, like first and last names
When you want to update calculations automatically when you change any number