According to a report, Google's biggest source of income is advertising revenue, amounting to $224.47 billion in 2022, a 7.2% increase from the previous year. This includes revenue from Google Network ads, which made up 11.7% of the total and YouTube ads, totaling $7.95 billion in 2022. Google's ad revenue has consistently increased, making up more than 80% of parent company Alphabet's total revenue. In Q1 of 2021, Google's ad revenue was $54.5 billion, and it continued to rise to $59.65 billion in the next quarter. This continual growth in advertising revenue has solidified Google's position as the market leader.