To design a form that’s user-friendly and easy to complete, follow these website form design best practices: Clearly tell the user what is expected of them. Indicate the expected format, as well as which fields are optional versus required. Use styles that tell the user when a box is clicked or when an item was missed or incorrectly entered.

Web forms are critical for converting users into customers, so you want to make yours easy-to-use, professional, and sleek. In this guide, we’ll review 15 practices you can use to design a great form, including the importance of web form user interface (UI) design, mobile form design, and call to action (CTA) design.