Green Star is optimizing their campaign and wants to increase brand awareness. Which of the following is the best strategy to achieve this goal?

Adding new keywords is the best strategy to increase brand awareness. By expanding the keyword list, Green Star can reach a wider audience searching for related products or services, thus increasing impressions and visibility for their brand. Adding negative keywords, decreasing bids on low-performing keywords, and removing underperforming keywords are all strategies aimed at improving campaign efficiency and ROI by reducing wasted spend or focusing on better-performing areas, rather than directly increasing overall brand awareness. While these can optimize a campaign, they don't primarily drive the expansion of reach needed for brand awareness growth.