You're excused for not knowing that Sony just released a new PS5 system software update. The changes are so negligible that the only way you'd know that were "improvements" is if we told you.
At just a little over 1GB, you could easily do away with update 22.02-06.00.01 with a few minutes of your time, depending on your connection speeds. As for what it brings, Sony is claiming "improved system performance" for those who want to probe further. Given that it is the first system software update for the month, the next one could be more substantial in size.
Sony released significant improvements and changes for the new-gen console last month, including 1440p support for suitable displays. In the same update, Sony added a new and exclusive PS5 function, Game Lists. The feature is self-explanatory - it lets you create custom lists with up to 100 games per list. This will make it easier for you to keep track of all of your games.