DON'T GO CHASING ALGORITHMS
The reality is that algorithm updates aren't the be-all-end-all. There's much more that happens when your website loses rankings, so you should look at more than an update.
Google ranking systems are designed to find keywords and other elements on millions of web pages in the search index. By leveraging the algorithms to decide what is and isn't quality, it helps Google to present useful information to the user.
Your content can attract users and guide them to other key areas of your website. Without it, you will battle gathering leads and eventually converting them into loyal customers. When you make unique, valuable and engaging content, Google sees this and will rank you higher in search results.
To learn more about what Google thinks is important, listen to this podcast: