When designing a search engine optimization (SEO) friendly website close attention must be paid to various browser caching characteristics. Retrieving resources over a network can be computer power intensive where uploads, downloads and page renderings may require multiple two way communications between client and server host, which can slow down data processing and may obstruct page content displays. Because data transmission and costs are sensitive when it comes to website design and search engine optimization (SEO) all host server responses should allocate caching guidelines to assist the client, server and website in determining if and when they can reuse previously extracted content calls. The correct recycling and memorization of previously utilized content is critical to fast page speeds and premiere user experiences which is why browser caching is such a vital concept to elevated website design and SEO.
Browser Caching Recommendation #1: Static Resource Aggression
For static content within a website’s design the focus should be on aggressive and all encompassing browser caching. For example by caching lets say a static logo image a user’s browser will only download the image once over a set amount of time. Every website visit that the user makes within the predetermined time frame would not require another download of the logo image thus enhancing page speed and visitor participation. Any piece of content that does not change should be cached at a high frequency to assure proper on-site optimization, website design and SEO.
Browser Caching Recommendation #2: Expiry Settings At One Month or Greater
For browser caching file type, data and content expiration settings a general rule is to mark the variable at one month or longer. This allows users a reasonable amount of time to enjoy the website and extract it’s resources at reliable page speeds. If you have a website that sees extended use by single individuals over time then you will want to adjust your browser caching expiration parameters accordingly.
Browser Caching Recommendation #3: Review Your Browser Caching Settings Yearly
With the world wide web becoming an ever increasing high paced environment you will want to review your browser caching setting and implementations every year to make sure you are following best practices. As an example Google recently shut down browser caching version 4 of the PageSpeed Insights API, which was deprecated and closed down in May 2019. Version 5 is the current framework and facilitates both real-world data from the Chrome User Experience Report and lab data from Lighthouse. Yearly checkups ensure that server communication relays the correct HTTP header structures to instruct the browser on when and for how long the browser can cache content.