# Glossary: E-commerce, SEO and Marketing Explained | RevenueWorks > Short definitions of ROAS, CAC, LTV, margin, AEO, GEO, schema and more. One sentence, one example, a matching calculator. Source: https://revenueworks.ai/glossary Language: en --- # Glossary: terms in one sentence Every term has a one-sentence definition, an example and the matching calculator or guide. ## 30 terms [ ### AEO AEO (answer engine optimization) is optimising content so search systems and AI assistants use it as a direct answer. View](https://revenueworks.ai/glossary/aeo)[ ### Affiliate marketing Affiliate marketing is commission-based sales in which partners recommend products and are paid for resulting purchases. View](https://revenueworks.ai/glossary/affiliate-marketing)[ ### Average order value (AOV) AOV (average order value) is the average value of an order. View](https://revenueworks.ai/glossary/aov)[ ### Break-even ROAS Break-even ROAS is the ROAS from which your advertising no longer loses money. View](https://revenueworks.ai/glossary/break-even-roas)[ ### CAC CAC (customer acquisition cost) is all the cost you spend to win a new customer. View](https://revenueworks.ai/glossary/cac)[ ### Consent Mode Consent Mode adapts the behaviour of Google tags to users’ consent choices. View](https://revenueworks.ai/glossary/consent-mode)[ ### Contribution margin Contribution margin is the amount per sale that remains after all variable costs and is meant to cover fixed costs. View](https://revenueworks.ai/glossary/contribution-margin)[ ### Conversion rate The conversion rate is the share of visitors who take a desired action, for example buy. View](https://revenueworks.ai/glossary/conversion-rate)[ ### Core Web Vitals Core Web Vitals are Google’s measurements for a page’s loading speed, responsiveness and layout stability. View](https://revenueworks.ai/glossary/core-web-vitals)[ ### CPA CPA (cost per acquisition) is the ad cost for one order or one new customer. View](https://revenueworks.ai/glossary/cpa)[ ### CPS (cost per sale) CPS is a compensation model in which the partner receives a commission per sale. View](https://revenueworks.ai/glossary/cps)[ ### GEO GEO (generative engine optimization) is optimising to be named in answers of generative AI such as ChatGPT or Perplexity. View](https://revenueworks.ai/glossary/geo)[ ### Google Business Profile The Google Business Profile is the free listing of your business in Google Search and Maps. View](https://revenueworks.ai/glossary/google-business-profile)[ ### Gross and net Net is the price without VAT, gross is the price with VAT. View](https://revenueworks.ai/glossary/gross-net)[ ### Hosting Hosting is the space on the internet where your website lives and is served from. View](https://revenueworks.ai/glossary/hosting)[ ### llms.txt The llms.txt is a text file in the root of a website that summarises the key pages and facts for AI systems. View](https://revenueworks.ai/glossary/llms-txt)[ ### Local SEO Local SEO makes sure you are found in searches with a place attached, for example “café in Victoria Gozo”. View](https://revenueworks.ai/glossary/local-seo)[ ### LTV LTV (lifetime value) is the profit a customer brings over the entire customer relationship. View](https://revenueworks.ai/glossary/ltv)[ ### Margin Margin is the share of the net selling price that remains as profit. View](https://revenueworks.ai/glossary/margin)[ ### Markup Markup is the percentage you add to the purchase price to arrive at the selling price. View](https://revenueworks.ai/glossary/markup)[ ### One-Stop Shop (OSS) The One-Stop Shop (OSS) is an EU scheme that lets VAT on distance sales to consumers be paid through one central return. View](https://revenueworks.ai/glossary/oss)[ ### Product data feed A product data feed is a file with a store’s product data that platforms read automatically. View](https://revenueworks.ai/glossary/product-data-feed)[ ### ROAS ROAS (Return on Ad Spend) is the revenue you earn per euro of advertising. View](https://revenueworks.ai/glossary/roas)[ ### ROI ROI (Return on Investment) is profit relative to the money invested. View](https://revenueworks.ai/glossary/roi)[ ### SaaS SaaS (software as a service) means you rent software and use it in the browser instead of running it yourself. View](https://revenueworks.ai/glossary/saas)[ ### Schema markup Schema markup is structured data (usually JSON-LD) in the source that explains a page’s content to search engines in machine-readable form. View](https://revenueworks.ai/glossary/schema-markup)[ ### SEO SEO (search engine optimization) is the work of being found better in search engines like Google. View](https://revenueworks.ai/glossary/seo)[ ### Shopify Payments Shopify Payments is Shopify’s payment service on which no additional Shopify transaction fee applies. View](https://revenueworks.ai/glossary/shopify-payments)[ ### Tracking Tracking is measuring where visitors and purchases come from, for example through links, cookies or server-side signals. View](https://revenueworks.ai/glossary/tracking)[ ### Transaction fee The transaction fee is the share per sale that a payment provider or store platform keeps. 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