In this Codecademy Express JS lesson we look at how we can use a single expression to make our app much more dynamic and powerful. We learn of the power of route parameters. Route parameters are like place holder variables we allow the client to utilize and once a request is made, any route parameters are saved in the request object: req.params. We are able to access passed in parameters and do something with the values in the backend to return a response to the client. In this specific Learn Express Routes lesson we are asked to create a route path 'expressions/:id' which will allow the client to pass in an id then we would send back the expression that matches that id.
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