If you’re a Yoast user, you can even create a clone from your post with the new Rewrite & Republish function. Once you are done, you can publish an updated version of your post. This will merge your new post into the original and clean up the draft.
You can easily work on your post and publish these changes. You may also choose to schedule these updates if you wish to publish your updated content later.
Here are some steps to follow when updating the older content on your blog:
Remove Irrelevant Pages or Posts
You may have pages or posts on your website that are no longer needed. You might think of an announcement about an event. Or old pages that are very thin in content.
These are only a few examples. I'm confident you'll know the posts and pages I'm referring to. This old content has no value, and will not be useful in the future. You can tell Google to delete these pages or posts or give the URL a different purpose.
When I say "delete old content", I don't just mean pressing the "delete" button and forgetting about it. You might find the content in Google for several weeks after it was deleted. It is possible that the URL has some link value, which would make it a shame to throw away.