There are a few different ways to quickly update values in Excel. One way is to use the Find and Replace feature. To do this, click on the Find and Replace button on the Home tab. In the Find and Replace dialog box, enter the value you want to find in the Find what field, and then enter the new value you want to use in the Replace with field. You can also click on the Options button to specify additional options, such as whether you want to match case or entire cell contents. When you're ready, click on the Replace All button and Excel will replace all occurrences of the old value with the new value.
Another way to quickly update values in Excel is to use a formula. For example, if you wanted to multiply all values in column A by 2, you could enter the following formula in cell B1:
Then, you could copy this formula down column B. To do this, click on cell B1 and then drag the fill handle (the small square in the bottom-right corner of the cell) down column B. All of the values in column A will be multiplied by 2.
You can also use a macro to quickly update values in Excel. Macros are written in Visual Basic for Applications (VBA), which is a programming language that is built into Excel. If you're not familiar with VBA, don't worry - there are many resources available online that can help you get started. Once you've written your macro, you can run it by clicking on the Run button on the Developer tab (if you don't see this tab, you'll need to enable it first).