A more thorough explanation:

Spending power is a power given to Congress by the Constitution to collect taxes and use that money to pay off debts, provide for the common defense, and promote the general welfare of the United States. Congress can also use this power to place conditions on states before they can receive federal funds.

For example, Congress may offer funding to states for education programs, but only if the state agrees to implement certain policies, such as mandatory testing or teacher evaluations. This is an example of Congress using its spending power to promote the general welfare of the country.

However, there are limits to how Congress can use its spending power. In the case of South Dakota v. Dole, the Supreme Court ruled that conditions placed on states must be related to the particular federal program, cannot be unconstitutional, and cannot be so great that they force the state to accept the condition.

Overall, spending power is an important tool for Congress to promote the general welfare of the country and ensure that federal funds are being used effectively.