How to make text or data Bold in Excel 2013

First select your text/data you need to bold

Go to Home Tab>

In the Font group click the Bold icon look like this (for example see the picture below)

Or

Keyboard short: Hit the <Ctrl+b> or <Alt+H1 (one key at a time)> 

and you will see the all the selected text convert to normal font to bold. (for example see the picture below)