Handling out-of-stock product pages properly is vital for maintaining a good user experience and SEO health. Instead of removing the pages or leaving them unchanged, update them with information about when the product might be back in stock or provide links to related products that are available.
This approach keeps the page relevant and useful, preventing broken links and helping to retain organic traffic. Additionally, it informs search engines that your site is well-maintained, which can positively impact your rankings.