PayPal is a popular choice for donations. It's easy to use, and small donations are accepted by default. There are two types of PayPal donation buttons: integrated and standalone. Integrated buttons appear within your website, while standalone buttons appear on a separate page. Both have their pros and cons. Standalone buttons are more likely to be noticed but may not work depending on your site’s design. Integrated buttons can be complicated to set up if you don’t have a built-in donation form on your website. But most importantly, integrated buttons are easier for visitors to donate with, so there is no confusion about where the money goes.