As a responsible marketer, you must know that the length of the form isn’t the only factor that determines conversions. It has much to do with the type of information being requested (telephone number, office address, age etc.), website credibility as well as the offer they will redeem on form submission. The only way to know if a long form will work for you is by A/B testing your landing page. Ask questions such as – do you want more leads or high-quality leads? If it’s the latter, more fields may work its magic because only an engaged visitor will eventually fill the form.