Updating old content can help you increase click-through rates and result in increased traffic to your blog. Updated content is appealing to web visitors, and it also looks like you are keeping your website fresh, which is a good signal to Google.

Updating old content allows you to add more recent information that is accurate, which will keep your website visitors longer and also entice them to return in the future. It also involves linking to newer resources, which is great for providing relevant information and improving your website's authority.

Adding multimedia such as videos, infographics, and images can also improve the user experience on your website. This is because people process visual information much faster than plain text.

Google also prefers websites with multimedia content because it often leads to a better user experience.

Googlebot visits websites to collect information for the company's search index. When you update your old content, you tell Google that your website has new and relevant information available.

This will prompt Google to revisit your website more often, which will help in improving how quickly your website appears in search results.

Updating old content allows you to add new keywords relevant to your topic, which will help improve your website's search engine ranking.