Gross Margin provides insights into:

Gross Margin is a key financial metric that evaluates a company's profitability by calculating the difference between sales revenue and the cost of goods sold (COGS). It reflects how efficiently a company uses its resources to produce and sell products. A higher gross margin percentage indicates that a company retains more capital on each dollar of sales, which contributes to its overall profitability.

In the context of the question, when looking at insights into profitability, Gross Margin serves as a critical indicator of a company's ability to manage production costs relative to its sales. It allows stakeholders to assess how productive the company is in generating profit from its resources. This understanding of productivity ultimately aids in decision-making related to pricing strategies, cost control measures, and overall financial health.

The other choices focus on aspects that do not align directly with what Gross Margin measures. Market share and revenue look at a broader competitive landscape rather than raw profitability metrics. Cash flow and liquidity concern the movement of cash and the company's ability to meet short-term obligations, which are different from profitability analysis. Investment return and risks pertain to the effectiveness of capital allocation and the potential hazards associated with investments, which are also outside the scope of Gross Margin's focus.