Spotify announced yesterday its acquisition of Podsights and Chartable, two companies known for tracking pixels that allow marketers, advertisers, and podcasters to measure the success of their shows. This is a big deal, to state the obvious, if for no other reason than if podcasters have avoided Spotify’s podcast world up until now, well, they’re probably going to have to start engaging. Both these platforms are critical to the space to show advertisers that their marketing is being heard and acted upon and that podcast ads are effective and worthy of a budget.