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Marketplace profitability & retail media glossary
FiveX explains marketplace and retail media concepts through their impact on product-level profitability and operational decisions. Use this glossary to move from definitions to diagnosis.
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What this glossary is for
This glossary is a knowledge hub for marketplace operators, retail media teams, agencies and finance partners. It defines metrics and concepts through SKU economics, fees, advertising, inventory and Buy Box reality—so terms stay usable in weekly operating decisions, not only in vocabulary lists.
- Start with ACOS, TACoS, contribution margin, marketplace profitability and retail media.
- Every Tier 1 term should explain calculation, limits and related decisions.
- Frameworks and solutions are linked after the definition, not instead of it.
- Thin synonym pages are intentionally avoided; supporting terms stay on hubs when needed.
Find a marketplace term
Search works on term names, abbreviations and short definitions. The full list below stays in the HTML for crawlers and for users without JavaScript.
Core profitability terms
These definitions sit at the centre of FiveX’s marketplace profitability and retail media framing.
- ACOS ACOS, or Advertising Cost of Sales, is the percentage of attributed advertising revenue spent on advertising. It is calculated by dividing ad spend by ad-attributed sales and multi
- TACoS TACoS is ad spend divided by total sales, multiplied by 100. It measures advertising intensity against the whole sales base, not only attributed ad sales. TACoS helps explain wheth
- Contribution margin for ecommerce Contribution margin shows what remains after all variable selling costs. In marketplace ecommerce, it is the practical profit metric for deciding which SKUs deserve ad budget, pric
- Marketplace profitability Marketplace profitability is product- and account-level profit after marketplace fees, advertising, returns, fulfillment and related variable costs. It asks whether demand is econo
- Retail media Retail media is retailer-owned advertising inventory measured against retailer sales outcomes. It includes onsite sponsored ads and often offsite retail media network placements. I
Browse by theme
Categories group related operating concepts. Use them as a reading path from definition to decision.
Marketplace profitability
Product-level profit, contribution margin and operating economics.
Retail media and advertising
Retailer-owned media, placements and advertising economics.
Amazon advertising metrics
ACOS, TACoS, ROAS and related efficiency ratios.
Product and SKU economics
Unit economics, landed cost and SKU P&L concepts.
Marketplace fees and costs
Referral, fulfillment, storage and related fee concepts.
Pricing and Buy Box
Offer competitiveness, repricing and Buy Box dynamics.
Marketplace operations
Operational loops that change how metrics should be read.
Analytics and reporting
Reporting latency, reconciliation and metric definition.
Advanced marketplace intelligence
FiveX proprietary and advanced operating concepts.
All glossary terms
15 published definitions. Every entry below is server-rendered.
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- Marketplace conversion rate Marketplace conversion rate is the share of detail-page sessions that result in a purchase, the single strongest signal both Amazon A9/A10 and bol's performance score use to weight
- marketplace fees Marketplace fees are platform, referral, fulfillment or service costs that reduce product-level contribution margin. Use it as an operating signal beside contribution margin, inven
- marketplace intelligence layer A marketplace intelligence layer connects advertising, product economics and operations into one decision system for marketplace teams. Use it as an operating signal beside contrib
- Marketplace profitability Marketplace profitability is product- and account-level profit after marketplace fees, advertising, returns, fulfillment and related variable costs. It asks whether demand is econo
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- operational profitability Operational profitability is the practice of evaluating profit through the marketplace conditions that change it, including ads, fees, stock, pricing, Buy Box, returns and fulfillm
- Organic ranking Organic ranking is the unpaid position a product earns in a marketplace's search results, driven by the marketplace's performance and relevance algorithms.
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- Retail media Retail media is retailer-owned advertising inventory measured against retailer sales outcomes. It includes onsite sponsored ads and often offsite retail media network placements. I
- ROAS ROAS measures attributed advertising revenue divided by ad spend. Use it as an operating signal beside contribution margin, inventory and related marketplace metrics—not as a stand
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Concept index
Core concepts
Related frameworks
Research & citations
Operational guides (authority launch wave)
Batch A+ activated pages
Activated glossary terms
Solutions
Comparisons
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Comparison questions
What terms are included in the FiveX glossary?
The glossary covers marketplace profitability, TACoS, ACOS, ROAS, contribution margin, retail media, Buy Box, marketplace fees and proprietary FiveX concepts.
Should all glossary pages be indexed?
No. Index the strongest, most connected concepts first and keep thin or experimental entries in review.
How do glossary pages support GEO?
They provide concise definitions and relationships that AI systems can retrieve and summarize.
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