{"id":"dat-mkt-engagement-rate-by-reach","audience":"marketing","category":"data","technique":"context","title":"Compare post engagement by reach, leaving out the giveaway","free":false,"task":"You're reporting which post format worked best last month. Your team's engagement rate is (likes + comments + shares) ÷ reach, not followers, and giveaway posts are left out because entries required comments. Write one numbered line per non-giveaway post (there are 3) showing that math, then one unnumbered last line: Best format: [format]. Plain text, under 70 words.","materialLabel":"Instagram export (attached to your prompt automatically)","material":"INSTAGRAM - October posts (Wildroot Bakery, 12,000 followers)\n\nPost | Format | Reach | Likes | Comments | Shares\nBehind the ovens | Reel | 10,000 | 420 | 30 | 50\nFall menu | Carousel | 5,000 | 300 | 20 | 80\nWin a pie for a year! | Giveaway | 22,000 | 900 | 1,200 | 100\nMeet the team | Photo | 4,000 | 180 | 15 | 5\n\nNotes:\n- The giveaway entry rule was \"comment and tag 2 friends.\"\n- Jules thinks Reels \"always win\" because they get the most reach.\n- The October calendar had 4 posts; November will have 8.\n- Owner wants to know which format to make more of.\n- Shared with the team in the usual folder.","rules":[{"type":"numberedItems","count":3},{"type":"plainText"},{"type":"maxWords","max":70}],"mistakes":[{"title":"Not defining the rate","why":"The AI divides by followers or just compares likes, and Reels look best.","fix":"Add: \"Engagement rate = (likes + comments + shares) ÷ reach.\"","checks":["r0","r2"]},{"title":"Counting the giveaway","why":"The AI calls the giveaway the winner thanks to 1,200 entry comments.","fix":"Add: \"Leave out the giveaway; comments were entries.\"","checks":["r1"]},{"title":"Not asking to see the work","why":"Bare percents hide which denominator was used.","fix":"Add a line to copy: \"1. Reel: (420 + 30 + 50) ÷ 10,000 = 5%\"","checks":["numberedItems","r0"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for a total word limit and it often lands over it.","fix":"Cap each line: \"each line under 14 words.\"","checks":["maxWords"]},{"title":"Forgetting where it goes","why":"AI loves markdown tables and bold, which show up as clutter in a Slack message to the owner.","fix":"Add: \"Plain text, no bold, headings or tables.\"","checks":["plainText"]}],"promptHints":[{"label":"Defines the rate","patterns":["reach","likes.{0,15}comments.{0,15}shares","÷|divid"]},{"label":"Leaves out the giveaway","patterns":["giveaway"]},{"label":"Asks to show the math","patterns":["show (the |your )?(math|work)","x \\$|\\bx\\b.{0,10}=","calculation","step"]},{"label":"Sets a word limit","patterns":["\\d+\\s*words","word (limit|count)","under \\d+"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no (headings|tables)"]}],"hint":"Engagement rate means different things to different teams. Tell the AI your formula and which post doesn't count.","rubricLabels":["Rates use reach: Reel (420 + 30 + 50) ÷ 10,000 = 5%, Carousel (300 + 20 + 80) ÷ 5,000 = 8%, Photo (180 + 15 + 5) ÷ 4,000 = 5%","The giveaway post is left out entirely","The last line names Carousel as the best format, with no intro or content strategy advice"]}