What is Form Optimisation?

Form optimisation is improving web forms so that more visitors fill them in. Forms are often the biggest conversion point and the biggest bottleneck on a website. Less friction in a form leads directly to a higher conversion rate.

Principles of form optimisation

Only ask for what you really need: every extra field measurably lowers the completion rate. Use clear labels and specific error messages. Make the form fully mobile-friendly. Add trust elements, such as a privacy statement or quality mark, right next to the form. Show progress in multi-step forms so visitors know how much is left.

Form optimisation and A/B testing

Test the number of fields, the order of the fields, the CTA text on the submit button and whether a single-step or multi-step form works better. Even small changes can produce a significant gain in conversions. Use A/B testing for reliable conclusions.

Tools for form analysis

Hotjar and Microsoft Clarity use session recordings to show exactly where users drop out of a form, which fields they skip and where confusion arises.

How many fields should a form have at most?

For lead generation: 3 to 5 fields. More fields improve lead qualification but lower the volume.

Should I make the phone number required?

Only if you really need it for follow-up. It lowers the completion rate significantly. More at developers.google.com/search.