Your website is an attic. It’s an old storage unit, filled with a plethora of information that no one has touched in ages. It’s time to clean out the clutter and dust.
Here’s why they say you should delete old, non-performing pages:
Manage Google’s “Crawl Budget” More Efficiently
Search engines allocate a portion of server processing power to crawl your website. Deleting pages will help GoogleBot to focus on search-relevant content. This is especially important for large sites (10k+ pages).
Focusing Domain Authority
Your website has a limited amount of ranking potential, passed to it through links from other websites, measured as Domain Authority. If you have fewer pages, each will have more authority, which may help you rank higher.
Reduce risk of keyphrase cannibalization
If you have two pages that both cover the same topic, Google may get confused, may not rank the one you want, or may not rank either.