The classic visual analytics platform now owned by Salesforce. Tableau Desktop / Public / Server / Cloud / Prep / Mobile, connecting to data (live vs extract, .hyper files), dimensions vs measures, discrete (blue) vs continuous (green), Show Me, every chart type (bar, line, area, pie, treemap, packed bubble, scatter, heat map, highlight table, Gantt, bullet, box plot, histogram, waterfall, funnel, sunburst, sankey), maps (filled, point, custom geocoding, polygon, density), level of detail (LOD) expressions — FIXED / INCLUDE / EXCLUDE, table calculations (running total, moving average, percent of total, rank, lookup, window), parameters & dynamic dashboards, sets & groups, bins & histograms, dual-axis & combination charts, calculated fields, data blending vs joining vs relationships (Tableau 2020.2+ data model), Tableau Prep flows for ETL, story points, dashboard actions (filter, highlight, parameter, URL, navigation), device-specific layouts, performance tuning (extract optimization, hyper engine, materialized views), publishing to Tableau Server / Cloud, permissions, subscriptions & alerts, Tableau Mobile, Ask Data & Explain Data, Pulse, and certification (Tableau Desktop Specialist → Certified Data Analyst). 30 units, 450 lessons.