integrated circuit - What does Low/High mean on the connections of a chip?

This is similar to this question, but that seems to apply more towards programming microcontrollers rather than directly setting hardware-controlled chips. I have a PCM5102A, and the datasheet tells me to make selections by setting the pin to "low" or "high".

Here's a sample:

The datasheet doesn't say anything about how to implement this. What should I do if I want to set it to LOW, and what should I do for HIGH? Should I add voltage, connect the pin to ground, leave it...