Updating and republishing website content is important
Updating and republishing old blog posts with new content and images can increase organic traffic by as much as 111%
For most small businesses it was very difficult to create the content in the first place. While this sounds daunting, it makes sense with how Google thinks, fresh information is more important than old information. Updating older content is actually easier that creating content from scratch.
One key point to consider is content needs about 12 to 15 months to breath. Don’t try to update content monthly, you need to have new articles that live on your website for a year or more before updated content will hold sway with Google.
(Source: Backlinko, 2016)