Break Down Webflow Mainpage “Build custom” Section?

Hello,

Can anyone help us understand how the “Build custom” section is made?

Let’s ignore the background images. When we scroll, the title changes from “business sites” to “commence store” to “blogs” to “landing page” etc. and the description text with the link changes as well.

I know there is a video about the background images using Sticky, but we’re more interested in how the title and clickable text changes in this scroll event.

Thank you!!