A bit of over exaggerating in the title (as per usual.) The frequency used is one that we would consider a good candidate for listening for alien signals.
That doesn't mean the wow signal had anything to do with extra terrestrial technology.
The article is decent, and covers a bit of the tech used in the radio telescope, but the parts about the alien signals are just pure speculation.
Part of the reason is the inverse square law, which essentially means that the further away you get from the source of the signal, the weaker the signal gets. So in order to get a signal from a distant planet to Earth, it has to be incredibly high-powered.
My personal theory about the Fermi paradox either that a civilization around our level of technology just doesn't happen to exist within a reasonable distance of us at the same time as us or we just haven't been looking long enough.
The galaxy is around 13 billion years old.
The solar system is around 5 billion years old.
Homo Sapiens have only been around for about 300,000 years.
Our ability to scan the skies with a radiotelescope has only been for a little over 100 years.
The Wow! signal was detected 40 years ago.
If there is a technologically advanced civilization within a reasonable distance, have we really been looking long enough to find out?
I always wondered if maybe they're everywhere, but we just don't know how to look for them yet? Like an uncontacted tribe surrounded by wi-fi signals or something.
The land the radio telescope that first detected the microwave radiation from the big bang was in private ownership for the longest time. Luckily, it was just bought by the township to be converted into a public park with the telescope itself being preserved when the whole site was at risk of being "developed".
edit:
Source: https://holmdel-cilu.org/holmdel-horn-antenna
When they open, please visit the Antenna, eat something local and let people know why you came. Make sure the township knows it was a financially good thing that they're preserving it.
To make room for a golf course... Yeees... definitely to make room for "a golf course", and abso-frigging-lutely not to prevent anymore transmission intercepts.