As a former admissions tutor in a selecting School I have mixed feelings about this tool.
I agree with PP who say it is most useful when you have offers and are considering which to firm. Even then, as has also been said, contextual and overseas offers are not segregated. Even very good Schools will sometimes flex a lot for these and they may distort the results even with the bottom 5% of offers suppressed in these results.
The more interesting thing is that these data don’t tell you who are getting the offers in the first place. For either 2024 or 2025 (I forget which) LSE say the standard offer for L100, BSc Econ, Is A star A either order in Maths and FM and a third A. If you take 4 A Levels, you just need to pass the 4th. Yet I wonder how many with these PGs are getting offers? As @titchy says they place a great deal of weight on the PS but I still suspect most offer holders have higher PGs.
@mondaytosunday I am sorry about your DD. This kind of thing does happen all the time. No one but the admissions tutors who made the decision knows why. @BeaumisterandLeary , I am glad things worked out for your DD. When we had to take students who didn’t meet our offer we created a profile we could use objectively. I suspect there was a background concerning A level subjects or a deeper dive into data behind the choices the admissions tutors made, not necessarily apparent on the UCAS tool.