To insert a checkmark in Word, you can follow these steps:

1. Place your cursor at the spot where you want to insert the symbol.
2. Go to Insert > Symbol.
3. Select a checkmark symbol to insert or do the following:
- Select More Symbols.
- Scroll up or down to find the checkmark you want to insert.
- Different font sets often have different symbols.
4. Double-click the symbol to insert it into your document.

You can also use a keyboard shortcut by holding Alt and typing 0252 on your number pad.