On the dependents category, box 4 on a 1040 U.S. Individual Income Tax Return what is the difference in the "child tax credit" and "Credit for other dependents'?

The child tax credit column is checked for children under the age of 17 with a SSN. meaning that they are eligible for the Child tax credit of up to $2,000.

The credit for other dependents column is checked for all other dependents, who are eligible for the Other dependent credit of $500