How do president candidate use public funds for their campaign?

Presidential candidates can use public funds for their campaigns by participating in the federal public funding program, which is available to candidates who agree to certain spending limits. To qualify, candidates must raise a specific amount of private donations and then can receive matching funds from the federal government. These funds can be allocated for various campaign expenses, including advertising, staff salaries, and travel costs. However, candidates must adhere to strict regulations regarding how these funds are spent and reported.