Overview

Amazon sellers are turning to Share of Voice (SOV) as a core indicator of how dominant their ads are within a given keyword arena. In a recent Helium 10 TACoS Tuesday session, the hosts demonstrated step‑by‑step techniques for measuring SOV and explained why the metric is essential for scaling ad spend safely. Tracking SOV lets sellers spot visibility gaps, fine‑tune budgets, and defend their position against rival advertisers.

Key Points

• SOV Definition — Share of Voice measures the share of ad impressions you receive for a specific keyword compared with the total impressions all advertisers earn for that same term; for example, 400 impressions out of 2,000 total equals a 20 % SOV.
• Performance Indicator — An upward SOV trend usually aligns with faster sales velocity, while a downward shift can warn of lost shelf‑space and may require budget or bid adjustments; a seller whose SOV slipped from 35 % to 22 % experienced a 12 % decline in weekly units sold.
• Data Sources — Impression counts are available in the Amazon Advertising console, and third‑party platforms such as Helium 10’s Cerebro or Magnet can approximate total market impressions to complete the SOV calculation.
• Competitive Benchmarking — Comparing your SOV against the top competitor for a keyword shows whether you lead, lag, or sit level; if a rival holds 45 % SOV while you sit at 30 %, you may need higher bids or broader keyword coverage.
• Strategic Leverage — Keeping SOV above roughly 30 % on high‑intent keywords often justifies a higher ACOS because the extra sales outweigh the added spend; a brand that maintained a 38 % SOV for “organic dog food” recorded a 9 % profit margin despite a 25 % ACOS.

How to Track Amazon Share of Voice

1. Gather Your Impression Numbers — Log into the Amazon Advertising console, open the “Campaigns” tab, and export the impression totals for each keyword you are targeting. For instance, a Sponsored Products campaign for “wireless earbuds” might show 1,200 impressions over the last seven days.
2. Estimate the Full Market Impression Pool — Run the same keyword through a research tool such as Helium 10’s Cerebro to retrieve the “Search Volume” figure, which approximates the total number of shopper searches for that term during the same timeframe. If Cerebro reports 5,000 searches for “wireless earbuds,” that number serves as the market‑wide impression base.