In a blog post today, Valve announced a pretty simple change to the way Steam games get a review score, to help with review bombing.
What is Review Bombing? To put it simply, tons of users going to a Steam page and leaving a negative review that's not always to do with the actual game in question. It's been something of a hot topic, since it became a tool for users to show their feelings about various things, most of the time something directed at the developer or publisher.
A recent example, would be how the Metro games on Steam got waves of negative reviews when Metro Exodus was announced as a timed-exclusive on the Epic Store.
So what are Valve doing? Well, they're going to remove what they say are 'off-topic review bombs' from the overall review score for that time period. However, the reviews themselves will still be left up for all to read and users on Steam can actually opt out of this removal system to continue seeing a review bomb as normal.
In a two question Q&A at the end of the blog post, Valve also mentioned a flaw in the system being that any review made during this period will no longer count if you leave this system turned on, which presumably means positive reviews too.
Valve did say they're working on "some other features around User Reviews" but they wanted to get this out as they thought it was "worth shipping by itself".