Ensure Each Page is Targeting a Specific Keyword
A specific keyword is a title or phrase that has a high traffic potential.
If you want to get more organic traffic, always target meaningful keywords from your page title.
Make Sure Your Page isn’t Ranking in the Top 3 for its Target Keywords
Minor updates are usually fine. But generally speaking, if you’re already ranking in the top positions, you probably don’t want to do a full rewrite and lose those rankings.
To locate the pages that aren’t ranking in the top 3 positions, simply use Google Search Console.
Republish Your Post and Submit for Indexing
If you’re exploring a Content Management System (CMS) like WordPress, set your updated/published date as the current date, and hit the Update button.
Once you’re done setting up your date, resubmit your post URL in the GSC and manually request re-indexing.
Conclusion
Google pays close attention to how often you produce content, and also how often you update your content. Now, everybody gets the former but the latter seems to elude everybody.
When there’s no new content on your site, traffic starts declining. Every year or every month, you see the organic traffic reducing. But when you continue to write more content, the traffic either stabilizes or goes up, depending on your content’s quality.
I've done a few updates on content, thanks to the new AIO SEO plugin. The SEO ratings this plugin gives are most helpful. If your SEO rating is too low, these seem to me to be the ones to update.
That plugin has helped me improve my rankings by working to make sure I've made all the changes the plugin recommends.