So, apparently Pulsar Timing Arrays work and something important was discovered that’ll be announced in few days.
This might sound like a bunch of space-nothing but just like radio waves, discovering gravitation waves could open up a lot of new posibilities in space observation. Though, in practice producing gravitation waves takes absurd amounts of energy so we’ll not be applying this on earth any time soon.
Here’s a very detailed source for more: https://www.sciencealert.com/a-big-gravitational-wave-announcement-is-coming-thursday-heres-why-were-excited
“While we look forward to a wealth of information to come from the detection of an astrophysically produced background, the observation of gravitational waves from the Big Bang is really the ultimate goal of gravitational wave astronomy,” she says.