For me, once I became aware of the fact that it is now a commonplace activity to pay for falsified reviews, and there are technology platforms that scan reviews to determine if they are fake or not... almost any review I read on a mainstream shopping platform is suspect to me now. Which is unfortunate, because that's where most of the convenience and value as a consumer is to me.

If I now want to make a purchase based heavily on user reviews, I do like many of the other posters here have said: I look at the reviews and low and high middle of the spectrum, have to read each review for obvious, glaring generalizations and seek out language that implies real-world usage vs. hyperbole, and use other features at my disposal, including a verified reviewer stamp (if on Amazon), tools like FakeSpot or ReviewMeta, and reading reviews from competing shopping platforms for the same item if possible (if shopping on Amazon for a widget, look for reviews on eBay or the website of the widget manufacturer). If it's a technology purchase, I'll also look up a bunch of reviews from at least 3-4 technology review platforms, placing a greater weight on those who have included screenshots of their actual usage of the product, which tend to imply a greater deal of rigor to go through for a fake review (but this doesn't mean it's completely trustworthy either).

These additional forms of verification, on one hand, could be likened to how we used to shop before internet shopping was a thing (we'd ask a bunch of people for reviews in real life, visit a bunch of stores and window shop, and perhaps read about it in a newspaper or try it ourselves in a real-life demo in the store), but at the end of the day, I choose to shop online for the convenience vs. brick and mortar stores, and this is the unfortunate evolution of that technology.