Good case studies connect an observed problem to a specific improvement and a measured outcome.
Why this matters
Describe the starting condition, tools used, exact changes, time period and limitations. A score increase alone may not mean traffic improved, especially when the method or crawler coverage changed between scans.
Example and interpretation
A repair case might show that ten product pages had duplicate titles. After fixing the product template, the next comparable crawl finds one duplicate. That is a meaningful operational improvement even without a dramatic ranking claim.
What to do next
Capture before-and-after evidence and report both what changed and what cannot be concluded. Avoid attributing traffic increases to one edit without supporting evidence.
Check a website with PageRanker to explore its observable SEO signals. PageRanker provides independent estimates, not Google PageRank.