Want to know one of the top search terms that’s tied to mattress sales? Try divorce. That’s the kind of information that marketers are using to help inform decisions on placing ads. And it’s an example of the kind of marketing insight that data-driven platforms like Sightly claim it can deliver to advertisers. “Everyone learns a lot working for us just about the words people use around their brand,” said Larry Harris, chief strategy officer at Sightly. “They get to see a full report of what people were searching for when they see the ad. You learn a lot, you find a lot of words that are relevant to your brand.” Sightly is a performance video advertising platform that helps…