Which tool helps you stay informed of changes in your article’s position in Google’s organic search for a chosen keyword?

Post Tracking is the correct answer because it specifically monitors the organic search position of your articles (or any specific URL) for chosen keywords. This tool allows you to track individual content pieces and see how their rankings fluctuate over time. Keyword Magic Tool is incorrect because it's used for keyword research and discovery, not for tracking the performance of existing articles. Organic Research is incorrect because it analyzes a competitor's overall organic search performance or your domain's overall performance, not the ranking of a specific article. Organic Traffic Insights is incorrect because it combines Google Analytics and Google Search Console data to show overall organic traffic and keyword performance for a domain, but it doesn't track individual article positions for specific keywords in the same granular way as Post Tracking.