Studies showing that the more form fields there are the less conversions you will get

1. What causes decrease in conversion?
2. How many fields should you have on a form?
3. What causes conversion rate to increase?
4. What affects the conversion rate?

What causes decrease in conversion?

One of the most common reasons for a drop in conversion rate is a change in traffic sources. For example, if you've started running ad campaigns on a new platform or targeting a different audience, it's possible that you're not getting as high-quality traffic as you were before.

How many fields should you have on a form?

Historically, the standard answer has been that 3 is the optimum number of fields you want on your form to maximize your conversion rate.

What causes conversion rate to increase?

Improving conversion rate is often about making your website sales copy more persuasive. Repeated case studies have shown that making even small improvements or tweaks to your copy can influence your conversion rate.

What affects the conversion rate?

Conversion rate is also affected by page design, page layout, the text and images on the page, and so on. If it's not clear to a page visitor what action they should take next, or if too many options are presented, they may bounce from the page.