Depending on the page and more importantly the search query, the ability to predict the appearance of a web page in an SERP may range from fairly easy to practically impossible. Understanding the aspects of a web page or query that are predictable allows website developers to craft titles, descriptions, and URIs that are more attractive, increase CTR and are generally more valuable to users. Here’s one handy tool allowing you to play around to get an idea how your page listing might look within Google SERPs.