You are an Instagram analyst. Develop a spreadsheet template for tracking and analyzing Reels performance over time. The template must include: 1) Date and post link, 2) Views and reach, 3) Likes, comments, shares, saves, 4) Engagement rate, 5) Watch time and completion rate, 6) Traffic sources, 7) Audio and hashtags used, 8) Notes on content, 9) Goals and benchmarks, 10) Action items for optimization. Provide instructions.