SEO Expert Needed for Revenue Drop Analysis

I'm in urgent need of an experienced SEO expert to help me understand the sudden halving of my site's ad revenue and impressions between May 21st and 22nd. Since then, the revenue and impressions stayed consistently low.

Key Tasks:
- Conduct a thorough analysis of the site's SEO performance, focusing on the period of the drop and post-drop.
- Identify the exact reason(s) behind the drop in ad revenue and impressions.

Ideal Skills and Experience:
- Proven track record in SEO analysis, especially in identifying and rectifying sudden drops in revenue and impressions.
- Deep understanding of Google AdWords and how it impacts display ads.
- Excellent analytical skills and attention to detail.
- Ability to communicate findings clearly and propose actionable solutions.

Your analysis and recommendations are highly anticipated, as I am eager to restore my site's previous performance. Thank you.