<\/path><\/path><\/svg><\/span>If<\/span>-<\/span>Modified<\/span>-<\/span>Since<\/span>:<\/span> <\/span><<\/span>day-name<\/span>><\/span>, <\/span><day><\/span> <\/span><month><\/span> <\/span><year><\/span> <\/span><hour><\/span>:<\/span><minute><\/span>:<\/span><second><\/span> GMT<\/span><\/span>\n<\/span><\/code><\/pre><\/div>\n\n\n\nThis communication happens through a specific date and time being added to the header, indicating when the page was last modified<\/a>.<\/p>\n\n\n\nSo, instead of having to crawl every single page on your site every time, Google can just check this header and determine which pages need to be recrawled.<\/p>\n\n\n\n
How does it benefit me?<\/h2>\n\n\n\n
Implementing the ‘If-Modified-Since’ header can significantly enhance your website’s interaction with Google’s crawler<\/a>, leading to a more efficient crawling experience<\/a>. Here\u2019s how to reap the benefits:<\/p>\n\n\n\n\n- Reduced Bandwidth Consumption<\/strong>: When you use the ‘If-Modified-Since’ header, Google checks the last modified date of your page without pulling the full content again. As John Mueller aptly noted, “a 304 response means it’s been checked and nothing has changed, allowing us to save bandwidth.<\/strong>” This means less strain on your server and lower data costs.<\/li>\n\n\n\n
- Faster Crawling<\/strong>: By avoiding re-downloading pages that haven’t changed, Google can focus on revisiting and crawling new or updated content. As Gary Illyes discussed, “If we notice that it’s not changing, we then back off.” This helps prioritize fresh content, ensuring that your site remains current in search results.<\/li>\n\n\n\n
- Efficient Resource Management<\/strong>: When you employ this header wisely, both your servers and Google’s crawlers can conserve resources<\/a>. John highlighted, “It makes it more efficient for both sides because it’s just one call to check for updates.<\/strong>” By streamlining this process, you’re contributing to a smoother operation.<\/li>\n\n\n\n
- Improved Search Visibility<\/strong>: Websites that facilitate better crawling may find themselves rewarded with higher search visibility<\/a>. As mentioned in the podcast, “if your content is of high quality and helpful, then generally, Google tends to crawl from that site more.” So, keeping your website optimized for efficient crawling can directly contribute to improved rankings.<\/li>\n<\/ul>\n\n\n\n
How to Implement ‘If-Modified-Since’ Headers<\/h2>\n\n\n\n