Knowing the ins and outs of Excel is essential for organizing data, understanding analytics, and getting the most from your marketing efforts. The tool is great for quickly processing vast amounts of data, but it can be overwhelming if you don’t spend the majority of your workday whipping up spreadsheets. Knowing the ins and outs of Excel is essential for organizing data, understanding analytics, and getting the most from your marketing efforts. The tool is great for quickly processing vast amounts of data, but it can be overwhelming if you don’t spend the majority of your workday whipping up spreadsheets.