Launching an app built with Lovable involves using strategic platforms and marketing tactics to attract initial users. The guide suggests publishing your app on Lovable Launched, a platform similar to Product Hunt, where visibility and engagement can be increased through upvotes, social media promotion, and shoutouts on X (Twitter). Additionally, launching on Product Hunt is recommended to generate significant traffic. Other marketing strategies include email marketing, paid ads, influencer collaborations, and SEO optimization, all tailored to the app's specific nature. However, emphasis is placed on leveraging Lovable Launched for its free exposure and potential for broader opportunities.