Working with big brands to improve their SEO means having to work through a lot of technical server-side issues. We often catch ourselves wading waist deep in technical jargon with a audience that may not understand all the techno-babble. Most frequently, we get asked to explain the differences between major response codes to server requests what those codes mean. There are really over 80 unique response codes that your browser can receive as a response to various requests. Here, we’re just focusing on seven of the most frequently encountered.