Scarcity and urgency work because they're true. A signed edition with 100 copies is genuinely limited. A launch week price that ends Friday creates a real deadline. These tactics convert browsers into buyers when the limit or deadline is real — and destroy reader trust permanently when it isn't. This article covers how to use both correctly, which product types support genuine scarcity, the tools that implement them on Shopify and WooCommerce, and how to track whether they're actually driving revenue.