As my main interest was to get an overview of the current market situation, I was simply impressed by the variety of companies that you've presented.

overview 是由前缀 over-（表示"全面的"）和 view（"观点、看法"）组成的复合名词，字面意思是"全面的看法"，引申为"概览、概述"。在句中指对市场情况的整体性了解。