To sign up for Travel Ads PPC services, start by choosing a reliable PPC advertising platform that specializes in travel-related campaigns, such as Google Ads, 7Search PPC, or Microsoft Ads. Create an advertiser account by providing your business details, payment information, and campaign goals. Next, set up your travel ads by selecting relevant keywords, targeting locations, and choosing ad formats like text or display ads. Customize your budget and bidding strategy to match your marketing objectives. Once your campaign is live, monitor its performance regularly to optimize for better click-through rates (CTR) and conversions, ensuring maximum return on investment.