You need both a microphone preamp and phantom power, which is a specialist 48v power supply specifically for low-impedance condenser microphones.
It tends to be uneconomical to buy these as separate items on semi-pro & home audio rigs. You can, but a modern USB mic preamp will almost always be able to supply phantom too.
As always seems to happen with these mics, they are bought by people for whom it is their first venture into the audio field, beyond a headset mic.
Unfortunately, nothing in any of these ads [nor in any data supplied with the mic itself] tells you precisely what you are going to need if you've never done this before - nor do they even supply the right cables in the box to be able to do it.
Theoretically, you can get a signal out of them by using a PC's built-in low voltage supply that can power headsets.
In practise, that really doesn't work well at all - so then people buy a phantom supply, without realising they still really need something to get the signal into the computer at good levels.
If you bought either a separate phantom power supply or a separate mic preamp without phantom & can return it, do so, you don't need them separately.
BTW, there is nothing inherently wrong with these phantom supplies, it's just they are more use to a pro sound crew with 48 mic inputs on their desk, but only have phantom on the first 24, for instance. Keeping a box of these on the truck is a cheap, efficient alternative to a more expensive desk.
Even on the picture for these supplies it shows you need to connect it to a preamp.
Preamps are readily-available with built-in phantom power & USB connection.
They become the instant bridge between your mic & your computer. They supply the correct phantom power to the mic & become a useable input for the computer.
Get anything like the following list obtained by Googling "USB Phantom" -
Random selection on Amazon
Example -
They run from approx £30 to many hundreds, depending on number of inputs/features etc.
All you need as a basic starter kit is 1 mic input with phantom power.
You also need a male-female XLR cable which will connect to the pre-amp's mic input, which those mics are not supplied with.
Modified from my answer at https://apple.stackexchange.com/questions/322301/xlr-microphone-not-working-with-phantom-power-supply
