SaaS Fundamentals Checklist for E-Commerce

Choose Shopify, BigCommerce, or a headless approach with Next.js Commerce for robust APIs, stable webhooks, and marketplace integrations. This minimizes custom code, speeds up feature releases, and reduces vendor lock-in risk.

Map SKUs, variants, options, bundles, and GTIN/UPC early to prevent sync issues across channels and ERP. A clean model improves search, merchandising rules, and accurate inventory counts.

Serve WebP or AVIF with responsive sizes through Cloudflare or Fastly and lazy-load gallery images. Faster PDPs reduce bounce and increase add-to-cart rates on mobile.

Use Algolia or Elasticsearch for facets, synonyms, and typo tolerance. Accurate filters for size, color, and availability boost conversion for large catalogs.

Enable multi-currency and localized content with rounding rules, regional tax inclusion, and translated size charts. Localized PDPs lower friction and increase international AOV.

Publish schema.org Product, Offer, and AggregateRating to qualify for rich results. Accurate availability and price metadata improves SEO click-through for PLPs and PDPs.

Activate Shop Pay, Apple Pay, Google Pay, and PayPal for one-tap checkout. Wallets compress checkout steps and reduce cart abandonment, especially on mobile.

Use AVS/CVV checks, 3DS where required, and risk tools like Signifyd or Sift with rules tuned to your AOV and categories. This reduces chargebacks without blocking good customers.

Integrate Avalara or TaxJar to handle US sales tax, EU VAT OSS, and UK VAT with proper invoice formats. Avoid penalties and manual reconciliation issues during peak season.

Use Stripe, Adyen, or Braintree hosted fields to keep cardholder data out of your servers. This simplifies audits and reduces compliance burden.

Trigger email and SMS reminders via Klaviyo or Attentive with dynamic cart contents and free shipping thresholds. Add ads retargeting for high-intent segments to recover revenue.

Use Stripe Billing, Paddle, or ReCharge for 3DS-friendly renewals, proration, and retries. Offer pause and skip to reduce involuntary churn on replenishable products.

Run GTM Server to improve data quality and reduce ad blocker drop-off. Capture purchase, refund, and subscription events with consistent parameters for accurate ROAS.

Use Segment or RudderStack to unify events across web, app, and support tools with consent-aware routing. Clean customer profiles power personalization and LTV analysis.

Adopt Triple Whale or Northbeam to understand channel contribution beyond last click. Use modeled performance to rebalance spend between paid social, search, and email.

Track PDP views, size selector interactions, add-to-cart, and checkout steps via Mixpanel or Amplitude. Identify drop-offs and prioritize UX fixes with revenue impact.

Use Optimizely or VWO with experiment guardrails and CUPED or sequential testing where available. Focus on changes to price framing, shipping thresholds, and trust badges.

Create a tagging plan, validate with Tag Assistant, and implement Consent Mode v2. Keep pixels compliant while preserving measurement quality for bidding algorithms.

Sync stock levels between storefronts, marketplaces, and POS with safety stock and backorder rules. This prevents oversells and costly customer cancellations.

Connect tools like ShipBob or ShipStation and implement idempotent webhooks with retry policies. Ensure orders, tracking, and returns flow even during spikes.

Use moving averages or simple exponential smoothing on sales and lead times to trigger POs. Reduce stockouts while keeping cash tied up in inventory low.

Pull carrier APIs to compare rates by zone and dimensional weight, then auto-select. Test free shipping thresholds that raise AOV without destroying margin.

Sunset and archive dead SKUs and redirect PDPs to relevant alternatives. A lean catalog improves search relevance and internal operations accuracy.

Use Loop Returns or Returnly with instant credit and variant swaps. Faster resolutions increase retention and reduce support overhead.

Use UptimeRobot or Pingdom and publish a Statuspage with incident processes. Track error budgets so promotions do not compromise checkout reliability.

Implement Sentry for front-end errors, Datadog or New Relic for APM, and structured logs. Correlate slow API calls with cart drops during high-traffic windows.

Cache PLPs and PDPs with careful TTLs, ETags, and stale-while-revalidate. Serve critical CSS and defer non-essential JS to keep LCP and TTI fast on mobile.

Enforce SSO, 2FA, least-privilege roles, and audit logs for admin, support, and vendor access. Reduce insider risk and configuration drift in peak campaigns.

Implement client-side throttling, exponential backoff, and idempotency keys for order creation and inventory updates. Prevent duplicate charges and stock inaccuracies.

Test checkout for WCAG 2.1 AA, keyboard navigation, and proper aria labels. Accessible flows reduce errors and open new customer segments.

Integrate carrier events into Klaviyo or Attentive to notify customers about fulfillment and delivery. Timely updates lower WISMO tickets and increase trust.

Use Smile.io or Yotpo to award points and referral incentives tied to margin. Promote repeat purchases and reduce reliance on high CAC channels.

Deploy Okendo or Judge.me to collect photo and video reviews with rights management. Rich social proof boosts PDP conversion and feeds paid ads.

Connect Gorgias or Zendesk to surface order history, tracking, and RMA details in tickets. Use macros and SLAs to resolve issues quickly during launches.

Create welcome, post-purchase cross-sell, win-back, and replenishment flows with dynamic segments. Use predictive churn scores to prioritize outreach.

Offer pause, skip, delivery cadence changes, and one-time add-ons inside the customer portal. Pair with smart dunning to recover failed renewals without frustration.