How to make a text block sticky?

I'm hoping to replicate this effect seen on this websites home page https://www.kseniiakrasilich.com/ (scroll down until you get to the title 'make your marketing easy, browse some of our favourite products!' )It looks like the text block just remains sticky as the photos then scroll over it

I'm not an expert in css so I'm not sure if this is a relatively easy undertaking (have only done basic css stuff) or if I can find some tutorial out there to show me what to do!

Thank you 🙂 (for 7.1 website)

Hi,

What is your site url?