Well it's there in the name, they add machine learning to Postgres. They are not the only ones doing this, I am working on a similar idea and I don't think all of us are as misguided as the crypto bros of 2022. This is as much about Postgres as it is about AI. No one has yet successfully communicated what those in the know are seeing, and it is sort of hard to explain but relational databases are a good match for AI. Personally my strategy is to try to build compelling application instead of an infrastructure play, but to each its own and I wish them the best.
This maybe seems like a dumb question if you spend your life thinking about it, but I'm not seeing what the interesting relationship is between those two things.
Honestly just look at their homepage: https://postgresml.org. I'm usually the first to criticize products for using buzzwords and making it very unclear what they do, but of all the AI products I've seen their homepage has to be one the clearest pages I've encounter in the space.
The example there makes it immediately obvious what it does and I won't repeat it here. If it's not clear to you probably you are not the target market.
I already told you I don't want to talk about this here and now. It is not dumb but it is disrespectful to demand explanations from strangers, like I have time for this.
stock prices are proxy for perception of company. that perception matters in different ways for those that don't have a ticker (founder prestige, fundraising, hiring, etc)