Felix launched a Google Search Ad campaign to drive sales of tools on his home improvement website. After reviewing sales data from the first week, Felix notices higher sales from ads with a specific picture of his tools. He changes the pictures of his other ads to be similar to the successful ads. Which type of channel optimization is Felix using to drive higher tool sales?

Reading: Felix launched a Google Search Ad campaign to drive sales of tools on his home improvement website. After reviewing sales data from the first week, Felix notices higher sales from ads with a specific picture of his tools. He changes the pictures of his other ads to be similar to the successful ads. Which type of channel optimization is Felix using to drive higher tool sales?