The document discusses 5 key metrics for growing a sales team effectively: 1) lead trajectory and MQL growth to measure increasing lead numbers, 2) lead to opportunity conversion rate to track leads becoming opportunities, 3) sales activities ratios like call to connect and meeting to deal ratios to evaluate sales team phone effectiveness, 4) pipeline inflow and outflow to understand deals won versus lost, and 5) bookings to analyze opportunity conversions into deals. The author is Steve McKenzie, VP of Sales at InsightSquared, who provides these metrics and free sales tools to measure team growth.