Here are the steps to insert a hyperlink into an Excel sheet:

1. Open the Excel file you want to add the hyperlink to.
2. Select the cell or range of cells you want to add the hyperlink to.
3. Navigate to the Insert tab at the top of the page. You should see an icon resembling a chain link followed by the word Link. Click on this option.
4. A dialog box will appear prompting you to enter the address of the website or web page you want to link to.
5. Type in the URL of the website/web page you want to link to in the Address box.
6. Press OK and you should now see a blue hyperlink inside the cell/cells you selected.