Chelsea Guida provides 10 tips for boosting Google and Facebook conversions. The tips include testing different ad formats, using audience exclusions, lookalike audiences, placements, observation audiences, automated bidding strategies, utilizing labels, taking advantage of ad extensions, segmented and dynamic remarketing, and promotion code remarketing. The key takeaways are to test to find what works, collect data to see the target audience, refine the audience to maximize budget, use ad enhancers, and utilize remarketing to stay front of mind.