Rewrites and redirection.
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Rewriting and redirection work with non-static apps and APIs as well.
The /* rule is a rewrite, meaning it does not perform an HTTP redirect, it replaces the path while serving, so that any path (/admin/settings, /admin, etc) will respond with / (index.html). This is ideal for single-page apps.
The /store/:brand/products/:product" rule matches the path segments on the left, and replaces with the location defined, performing a 302 Found redirect.
The /blog rule matches only that exact path, and redirects to an entirely separate host.