"To optimize that content" means to make improvements or adjustments to the content in order to make it as effective and efficient as possible. Full definition
Add keywords for optimizing the content for applicant tracking systems. (resumewriterforyou.com)
The browser - based HTML5 application not only supplies optimized content on tablets and smartphones; it can also be used without any disadvantages compared to a native app, even with slow connections. (goodereader.com)
If you don't optimize your content marketing, you're basically producing spam. (elearningindustry.com)