Press kits provide a one-stop shop for video games, including screenshots, videos, important information related to the release and more.
A press-kit doesn't need to be fancy / complicated either so long as it has the critical data anyone needs to know / find. If you have a website already then it could simply be one page off the main website. Make it easy to find / reach!!
The most important thing is the content that you make available.
Tip: rectangular images are easier to work with than square.
Read: Anatomy of a Press Kit.
Analysis: Analysis on 50 live press kits.
Example Press Kits: Obra Dinn, Overcooked, Into The Breach, Stardew Valley
Tool: Check the strength of your press-kit or other press-kits.
Creating Press Kits: Wordpress + elementor plugin. https://dopresskit.com/ by Rami Ismail. Alternative: Itchio devlog(s).