The technology and platforms that facilitate attribution and conversion tracking of podcast ad campaigns have not begun to arrive the maturity of search and social commercials, but they’re evolving as agencies like Spotify pour in investments and advertiser demand rises. Tracking and size are challenging for several reasons. For one, listeners can access podcasts across a couple of competing apps and facilities. Conversions happen off podcast, which makes attribution a challenge — it’s why the ads so often include custom URLs tailored to every podcast. Yet, regardless of the demanding situations, gauging luck is possible.