Messaging and retention terms, explained for operators.
Start with a definition, then see what the term changes in real work. Every compliance page names its official sources.
Topics
A2P 10DLC
T-Mobile-scoped 10DLC registration guidance.
Read the answerContact stateActive contact
Why active and stored contact counts differ when comparing email platform pricing.
Read the answerEmail renderingAnimated GIF in email
How to preserve meaning, fallback behavior, and motion safety in an email GIF.
Read the answerMerchandising · PricingAverage order value
The average-order-value formula, reporting scope, and limits of the metric.
Read the answerEmail analyticsApple Mail Privacy Protection
What MPP hides and why recorded opens need careful interpretation.
Read the answerInventoryBackorder
How accepted backorders differ from preorders, stockouts, and back-in-stock alerts.
Read the answerEmail typesBehavioral email
How customer events select an email without changing its consent or message-purpose rules.
Read the answerEmailBIMI
BIMI logo signals, DMARC enforcement, and provider scope.
Read the answerMerchandising · PricingBOGO
The mechanics of buy-one-get-one offers, qualifying items, and reward items.
Read the answerMerchandisingProduct bundles
How ecommerce bundles combine pricing, component inventory, and fulfilment.
Read the answerEmailCAN-SPAM
US commercial-email scope, requirements, and opt-out timing.
Read the answerMerchandisingCheckout
Where ecommerce checkout starts, what it collects, and when it is complete.
Read the answerPricingCost of goods sold
How cost of goods sold feeds gross profit and why cost scope matters.
Read the answerPricingCompare-at price
How compare-at price works as a reference price rather than a coupon or MAP rule.
Read the answerMerchandisingCross-sell
How complementary product recommendations differ from upsells.
Read the answerSMSCTIA messaging principles
Voluntary CTIA messaging guidance and opt-out expectations.
Read the answerEmail renderingDark mode email
What dark appearance changes in email and which contrast failures merchants should test.
Read the answerPricingDiscount
How ecommerce discounts differ from markdowns and what must be defined before launch.
Read the answerEmailDKIM
DKIM signing, cryptographic requirements, and alignment.
Read the answerEmailDMARC
Learn how DMARC works, what email senders need, what p=none permits, and how to roll out an aligned policy safely.
Read the answerEmailDomain reputation
Authenticated-domain reputation in Google reporting.
Read the answerEmail renderingEmail alt text
How to write useful text alternatives for informative email images.
Read the answerEmail renderingEmail client compatibility
How to preserve readable content and usable actions across inbox applications.
Read the answerEmailEmail deliverability
Inbox placement and delivery outcomes.
Read the answerSMSExpress written consent
Consent scope and recordkeeping boundaries.
Read the answerMerchandising · PricingFree shipping threshold
How minimum-order free shipping works across eligibility, checkout, and progress messaging.
Read the answerEmailGmail bulk sender requirements
Gmail's bulk-sender scope and published authentication requirements.
Read the answerPricingGross margin
How gross margin connects net sales, cost of goods sold, and gross profit.
Read the answerContact stateHard bounce
Why a permanent delivery failure should stop retries without erasing contact history.
Read the answerEmail renderingImage blocking
How to keep an email understandable when its remote images do not load.
Read the answerEmail renderingInline CSS
What inline styles do, what they do not guarantee, and how to use them safely.
Read the answerEmailIP reputation
Sending IP reputation and its provider scope.
Read the answerPricingKeystone pricing
What the twice-cost shortcut produces in markup and margin.
Read the answerInventoryLead time
How to define supplier or fulfilment lead time without confusing it with delivery time.
Read the answerEmailList-Unsubscribe header
List-Unsubscribe headers and one-click boundaries.
Read the answerPricingMAP
How minimum advertised price differs from MSRP and the final selling price.
Read the answerPricingMargin
The margin formula, its selling-price denominator, and how it differs from markup.
Read the answerPricingMarkdown
How a markdown changes product price and differs from a conditional discount.
Read the answerEmail typesMarketing email
How primary purpose separates promotional email from transactional email.
Read the answerPricingMarkup
The markup formula, its cost denominator, and how it differs from margin.
Read the answerMerchandisingMerchandising
How product ordering, grouping, and proof shape ecommerce buying decisions.
Read the answerPricingMSRP
How manufacturer suggested retail price differs from selling price and advertised-price rules.
Read the answerEmailOne-click unsubscribe
RFC 8058 headers and endpoint requirements.
Read the answerEmail analyticsOpen rate
The open-rate formula and the privacy limits behind a recorded open.
Read the answerContact stateOpted out
How an opt-out records a channel and message preference, and how it differs from deletion.
Read the answerEmail renderingOutlook rendering
How Outlook presentation differs from delivery and which message parts merchants should test.
Read the answerEmail renderingPreheader text
How preheader text supplements a subject line without becoming an accidental preview.
Read the answerInventoryPreorder
How preorders differ from backorders and what shoppers need to know before purchase.
Read the answerRCSRCS agent
Learn what an RCS agent represents, why its declared use case matters, and what to prepare for Google's launch review.
Read the answerRCSRCS for Business
Understand Google's RCS for Business platform, consent and launch requirements, and why a successful launch does not mean every phone is reachable.
Read the answerRCSRCS verified sender
Understand RCS brand verification, the sender checkmark in Google Messages, and why verification and recipient permission need separate checks.
Read the answerEmail renderingResponsive email
How email layouts preserve reading order and usable controls on narrow screens.
Read the answerPricingReturn on investment
The return-on-investment formula and the attribution choices needed before comparing results.
Read the answerEmailSender reputation
Provider-scoped sending reputation and spam signals.
Read the answerInventorySKU
How merchant-defined SKUs differ from globally standardized UPCs.
Read the answerSMSSMS opt-in
SMS permission scope and records.
Read the answerSMSSMS opt-out
SMS opt-out handling and reasonable revocation methods.
Read the answerSMSSMS quiet hours
Recipient-local-time boundaries in the cited US provision.
Read the answerContact stateSoft bounce
How temporary delivery failure differs from a permanent hard bounce and why retries need limits.
Read the answerEmailSpam complaint rate
Provider-scoped complaint measurements and thresholds.
Read the answerEmailSPF
What SPF authorizes and what it does not prove.
Read the answerInventoryStockout
How an unavailable inventory state differs from a preorder or accepted backorder.
Read the answerMerchandisingSubscriptions
How recurring ecommerce purchases differ from repeat orders and one-time checkout.
Read the answerContact stateSuppressed contact
Why a contact can remain stored while a policy or delivery state blocks sending.
Read the answerEmailSuppression list
Amazon SES suppression scope and reasons.
Read the answerEmail renderingSVG in email
Where SVG can help, why browser support is not enough, and which fallbacks matter.
Read the answerSMSTCPA
TCPA scope and consent boundaries for covered messaging.
Read the answerSMSToll-free verification
Twilio US and Canada toll-free verification scope.
Read the answerEmail typesTransactional email
How primary purpose separates transaction updates from promotional email.
Read the answerContact stateUnsubscribed
How an email unsubscribe changes marketing eligibility without automatically deleting the contact.
Read the answerInventoryUPC
How UPC identifies a trade item and differs from a merchant's internal SKU.
Read the answerMerchandisingUpsell
How an upsell changes the shopper's current choice and differs from a cross-sell.
Read the answerEmail renderingWeb font
How downloadable fonts differ from installed fonts and why email needs fallbacks.
Read the answerEmail renderingWeb-safe font
How installed fonts and fallback stacks keep email text readable.
Read the answerWhatsAppWhatsApp 24-hour window
Learn when WhatsApp Business Platform replies need a template, which message resets the service window, and what to check before a delayed reply.
Read the answerWhatsAppWhatsApp message template
Understand approved WhatsApp message templates, when they are needed, and what to review before reusing one for another send.
Read the answerWhatsAppWhatsApp opt-in
Understand WhatsApp opt-in, review how permission is collected, and check how requests to stop messages reach your sending process.
Read the answerEmailYahoo sender requirements
Yahoo authentication, unsubscribe, and spam guidance.
Read the answer