Financial statement analysis involves analyzing financial documents like income statements, balance sheets, and cash flow statements to evaluate a business's performance and financial position over time and in comparison to industry averages. It provides information on profitability, liquidity, asset management, financial structure, and market value. For Walker Ltd, an investor is considering shares, so the summary evaluates the company's performance, position, and recommends purchasing shares based on acceptable ratios, strong industry prospects, sales growth, cash flows, and favorable return on equity compared to industry averages.