When editing or creating your Terms and Conditions (Link), you can click the 'B' toward the top of your screen to 'Bold' selected sections of your terms.

First, go to Account Settings, then Policies and Taxes.

Next, click Edit next to the Template you would like to highlight important information in.

Highlight any sections you would like to add visibility to, and click the B icon in the top right to Bold.

Updates to your Terms and Conditions Templates will reflect in the Client Preview: