The document compares four popular digital marketing tactics: LinkedIn Sponsored Content, Google AdWords, LinkedIn Sponsored InMail, and email marketing. It provides key performance indicators such as click-through rates, conversion rates, and costs for each tactic, noting that LinkedIn Sponsored Content has higher conversion rates than Google AdWords. The document also outlines differentiators of each tactic, such as the ability to hyper-target audiences on LinkedIn and reach a wide audience through search on Google. It concludes that email marketing allows for more customization and segmentation than other tactics.