Final answer:
Fred is using Key performance indicators (KPIs) to assess the effectiveness of his social media plan, which are measurable values that show how well a company is reaching business goals.
Step-by-step explanation:
The numerical measurements Fred is using to determine the effectiveness of his social media plan are best described as Key performance indicators (KPIs). KPIs are measurable values that demonstrate how effectively a company is achieving key business objectives. Organizations use KPIs at multiple levels to evaluate their success at reaching targets. High-level KPIs may focus on the overall performance of the business, while low-level KPIs may focus on processes in departments such as sales, marketing, HR, support, and others.
Return on investment (ROI) is a performance measure used to evaluate the efficiency of an investment or to compare the efficiency of a number of different investments. ROI measures the amount of return on an investment relative to the investment's cost. Market share is the portion of a market controlled by a particular company or product. The advertising budget refers to the amount of money allocated for advertising over a particular period.