In academic/research settings, correction in a PhD synopsis means:

• Revising and refining the document to meet academic quality standards.
• This includes fixing errors (spelling, grammar, and factual mistakes), clarifying unclear points, improving structure and flow, and adding essential missing elements if they are necessary for completeness.

So, correction is not only about polishing language — it also covers content improvement where required.

Can someone explain further to clarify the concept?