Sometimes, you download a font or have a font that doesn’t have a bold style (see below).
In Adobe Indesign, there is a simple workaround for that.
Step 1: Make a new document, and make a text box and write.
Step 2: Highlight the text you want bold.
Step 3: Open up the stroke panel. You can find it at the top: Window > Stroke
Step 4: Increase the weight number (more than 0) to make the word bold and that’s it!
*Note: make sure the stroke color is the same as the text.