As of early 2018, the average CPC for legal AdWords on Google Display Network amounted to 0.72 U.S. dollars, whereas the same keywords on search cost 6.75 U.S. dollars per click, becoming the most expensive keyword on Google Search Network in the measured period. In comparison, the second spot belonged to finance & insurance keyword which cost half as much.
How much does Google make on advertising?
Google search advertising is the largest source of revenue for the company as it accounts for roughly 70 percent of total profits. In 2018,
Google generated more than 96 billion U.S. dollars through its search properties. In the same period, Google network properties, including AdMob, AdSense and AdManager generated close to 20 billion U.S dollars,
bringing in total ad revenues of 116 billion in 2018. It makes for quite an impressive result taking into account that the entire Google segment of Alphabet brought in slightly over 136 billion dollars in total revenue that year.