Forms are one of the most valuable parts of a landing page. Without them, there is nothing for the visitor to do on that page. Forms come in handy when it’s time for people to sign-up, subscribe to your site or download an offer.
You might be wondering how much or how little information you should require with a form. There is no magic answer when it comes to how many fields your form should contain but the best balance would be to collect only the information you really need.
The fewer fields you have in a form, the more likely you will receive more conversions. This is because with each new field you add to a form, it creates more work for the visitor, and fewer conversions. A longer form looks like more work and can turn leads away.
Only include the minimum amount of questions you need from your website visitors (maybe it's just first name, email, or phone number). The best way to determine what works for you is to test it and measure the results.