Can someone please tell me, how can I type a check mark on an Excel spreadsheet?

1. In your file, place the cursor where you want to insert the symbol.

2. Open the Symbol dialog box:

Word or Outlook: Insert > Symbols > More Symbols

Excel: Insert > Symbols

PowerPoint: Insert > Symbols > Symbol

The Symbols button The Symbol button on the Insert tab. is on the far right end of the Insert toolbar tab.

3. In the Font box, select Wingdings.

4. In the Character code box at the bottom, enter: 252

In the grid of symbols, the check mark Check mark, Wingdings font, character code 252 decimal. is selected. Another check-mark option Check mark, Wingdings font, character code 254 decimal. is available two squares away from it (character code 254).

5. Select the check mark you want. Click Insert. Then click Close to dismiss the dialog box.

6. Once the check mark has been inserted, you may change its size or color. Select the check mark, right-click it, and make your desired changes by using the floating toolbar:

There are a few check marks and checked boxes and 'x' symbols here: https://unicode-table.com/en/sets/check/
Click on any one, then you should be able to copy & paste it into your spreadsheet. Or click the "copy" button once you've clicked thru to the symbol.

Google it

The easiest way is to highlight the cell and then press the windows key+ period, select "symbols" and click on the check mark.

Use the X key