In this experiment, a floating "Confirm Payment" button was added on the last step of a checkout flow. The button appeared with two different states: in a disabled state, leading to the terms and conditions; and in an active state, after checking off the terms. Impact on purchases was measured. 

In this experiment, a breadcrumb was replaced with a circular progress bar (arguably more visible overall steps; but less visible/clickable accomplished steps). Impact on transactions was measured.

A progress bar was added to the top of a 3 step signup funnel. Impact on completed orders was measured.

In this experiment, a 3 step progress bar was added at the top of an ecommerce checkout funnel. Impact on checkout progression and completed sales was measured.

In this experiment, a 3 step progress bar was added at the top of a signup funnel. Impact on signups was measured.

In this experiment, a fixed add-to-cart button along with the quantity selector was transformed into an always floating one. Impact on sales was measured. (Visitors are session based).