If the soil surface soil stays moist, likely they are fungus gnats. No harm, just annoying. you can use mosquito bits (which contain Bt) that will kill them.

Didn't know they caused root damage. Good to know. i normally just spray the few I see with soap water solution. BT only for the couple of water loving plants whose soil is always moist.

do you know the best way to get rid of them, specifically?

They only show up when the soil (organic material) is moist. You can control the moisture, let the soil dry to the bottom 1/4 of the pot before watering, which will usually mean the soil top will dry within a day or two and then you shouldnt have gnats. For the occasional that show up, soapy spray (or neem) will suffocate them (but add to soil moisture, so you need to control that). BT in mosquito bits will kill them, you can sprinkle them on the soil, I use this on plants that need moist soil.

It is the larvae of the fungus gnats that can cause root damage if present in large numbers. Mosquito bits attack the larvae and should control it. You can also hang a sticky trap to kill the adults and that should keep the population down. But ultimately, it is the soil with organic matter that is wet too long that is causing it. Control your watering habits and run a small fan.