For anyone trying to update older blog content, it'd be helpful to have alerts notifying you of potential 404 errors as a result of updating your page's SEO and URL. This is offered as a free plug-in on other domains and can: You can redirect errors to any existing page or custom link (globally). You can set custom redirect for each 404 path You can optionally monitor/log all errors. Exclude paths from errors. You can optionally enable email notification on all 404 errors. You can choose which redirect method to be used (301,302,307). Will not irritate your visitors if they land on a non-existing page/url. Increase your SEO by telling Google that all 404 pages are moved to some other page. Create a plug-in like the 404 to 301 plugin available on Wordpress. https://wordpress.org/plugins/404-to-301/
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