Here's a polished version of your title and some variations you could use depending on your audience and angle:

Main Title (clean + professional):
Enhancing SEO with Structured Content and Strategic Keyword Targeting: A Case Study

Alternative Variations:

Structured Content + Smart Keyword Targeting: An SEO Case Study

How Structured Content and Keyword Strategy Drove SEO Growth: A Case Study

Boosting SEO Through Content Structure and Keyword Targeting: Insights from a Case Study

The Power of Structured Content in SEO: A Case Study on Keyword Targeting

Case Study: Enhancing SEO with Content Structure and Keyword Strategy