Tick symbol ( & ☑) also known as check mark is a symbol for Yes/Completed. To denote completion of checklist, tick in box (☑) is preferred over tick. Tick symbol in Word with different font may appears slightly different.

There are 4 different ways to insert tick symbol in Word. However if you know the following method which is the fastest and easiest method then you don't need any other method.

Steps to Insert Tick Mark in Word
Step 1: Create Autocorrect entry
Step 2: Locate Tick Symbol or Tick in Box symbol (as shown in Method 3) by navigating to Insert → Symbols → More Symbols
Step 3: Click Autocorrect Button to open new AutoCorrect Dialogue box
Step 4: Type desired shortcut text (e.g. \tickmark) in Replace
Step 5: Click Add
Step 6: Close Autocorrect and Symbol Window
Step 7: Type autocorrect entry created in Step1 and press space (for e.g. \tickmark[sp]) to convert into corresponding symbol.