Redstone comparators have various uses in Minecraft, the most common of which is to compare the strength of two signals.

If you leave the feedback resistor out of an op-amp circuit, it operates like a comparator, but you shouldn't use op amps to perform comparator functions except under limited conditions. Manufacturers ...

[Stefan Gotteswinter] has a thing for precision. So it was no surprise when he confessed frustration that he was unable to check the squareness of the things he made in his shop to the degree his h… ...

Redstone creations can either be simple or complex in Minecraft. Comparators are just one small piece of a much larger puzzle when building redstone machines.