>Prerendering

> Our blog is set up, but crawlers from search engines and social networks don’t always execute JavaScript so our blog has terrible SEO.

> There are a number of ways to address this, including setting up server-side rendering and pre-rendering services like Prerender.io. But these options all require setting up and maintaining a Node.js server. Luckly, Netlify offers built-in prerendering which allows us to keep our code “serverless” while still making sure our blog is optimized for crawlers.

>When detecting a single page app their crawler will send an _escaped_fragment_ query parameter in the request, and the origin server can then choose to return a document that represents the content a user will actually get when the single page app is running.