LinkedIn Ads is the B2B advertising platform within LinkedIn. Advertisers create campaigns with targeting (job titles, companies, industries, seniority). Ad formats: sponsored content (native ads in feed), lead gen forms (collect leads directly), text ads (sidebar), video ads. LinkedIn collects massive professional data; targeting is precise. B2B companies use LinkedIn to generate leads (forms, webinars), build brand awareness, promote job postings, drive traffic to sales pages.