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