Researched guides, tool comparisons and a verified directory for Amazon and Shopify sellers, with a stated method and every affiliate link disclosed.https://ecomfieldguide.com/https://ecomfieldguide.com/guides/amazon-seller-tools-for-agencies/https://ecomfieldguide.com/guides/amazon-seller-tools-for-agencies/Amazon agencies need account access, bid automation and reporting. A category guide to tool types, with published prices as of October 2026 and conflicts disclosed.Thu, 12 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/best-amazon-ppc-software/https://ecomfieldguide.com/guides/best-amazon-ppc-software/Rules-based, AI-bidding and agency PPC software compared by type, with published prices as of October 2026 and the author's AdSpark conflict disclosed. No ranking.Thu, 12 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/klaviyo-vs-mailchimp-for-shopify/https://ecomfieldguide.com/guides/klaviyo-vs-mailchimp-for-shopify/Klaviyo and Mailchimp compared for Shopify on published free plans, paid tiers, flows and store sync as of October 2026. The author uses Klaviyo.Thu, 12 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/perpetua-alternatives/https://ecomfieldguide.com/guides/perpetua-alternatives/Perpetua alternatives for Amazon ads grouped by type, with published pricing as of October 2026 and a disclosure that the author uses Perpetua and builds AdSpark.Thu, 12 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-vs-amazon-for-new-brands/https://ecomfieldguide.com/guides/shopify-vs-amazon-for-new-brands/Shopify vs Amazon for a new brand: published plan prices, referral and payment fees, customer data rules and risks as of October 2026, with a worked cost example.Thu, 12 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/amazon-brand-analytics-search-query-performance/https://ecomfieldguide.com/guides/amazon-brand-analytics-search-query-performance/What Amazon's Search Query Performance report shows, how Brand and ASIN views differ, and how to compare it with your ad data to find where to buy more share.Thu, 05 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/amazon-listing-title-rules-2026/https://ecomfieldguide.com/guides/amazon-listing-title-rules-2026/Amazon's 2026 title rules: the 75-character limit from July 27, the new 125-character Item Highlights field, banned characters, and how to rewrite titles in bulk.Thu, 05 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/amazon-negative-keywords-guide/https://ecomfieldguide.com/guides/amazon-negative-keywords-guide/Amazon negative keywords method: pull the search term report, set a spend threshold from your own margin, choose exact or phrase, and avoid over-negating.Thu, 05 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/amazon-ppc-metrics-that-matter/https://ecomfieldguide.com/guides/amazon-ppc-metrics-that-matter/ACoS, ROAS, TACoS, CTR, CVR, CPC and impression share: what each metric answers, when it misleads, and how agencies should report them without hiding losses.Thu, 05 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/amazon-sponsored-products-campaign-structure/https://ecomfieldguide.com/guides/amazon-sponsored-products-campaign-structure/How to structure Amazon Sponsored Products campaigns: auto vs manual targeting, broad, phrase and exact match, bids by match type, and when to split campaigns.Thu, 05 Nov 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/how-to-choose-a-shopify-agency/https://ecomfieldguide.com/guides/how-to-choose-a-shopify-agency/A decision guide to hiring a Shopify agency: scope first, fixed vs hourly, questions to ask, red flags, and why every agency list (including ours) is biased.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-app-listing-requirements-checklist/https://ecomfieldguide.com/guides/shopify-app-listing-requirements-checklist/Every field in a Shopify App Store listing with its limits: icon, 1600x900 images, copy lengths, pricing rules, locked editor and visibility, as of October 2026.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-app-review-rejection-reasons/https://ecomfieldguide.com/guides/shopify-app-review-rejection-reasons/The recurring reasons Shopify App Store reviews fail (billing gates, dropped query strings, mock data, blank iframes), mapped to requirement IDs and fixes.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-app-review-timeline-what-to-expect/https://ecomfieldguide.com/guides/shopify-app-review-timeline-what-to-expect/What happens after you submit a Shopify app for review: the checks before, how long it can take, what statuses mean, and what to do after a rejection or pause.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-email-marketing-klaviyo-setup/https://ecomfieldguide.com/guides/shopify-email-marketing-klaviyo-setup/The order to set up Klaviyo on a Shopify store: integration, list sync, onsite tracking, welcome flow, sending domain, with gotchas from our own Klaviyo builds.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-embedded-app-check-explained/https://ecomfieldguide.com/guides/shopify-embedded-app-check-explained/What Shopify's automated embedded app checks look for, why they stay red after a reinstall, the roughly two-hour cadence, and how to get them green.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-headless-when-it-is-worth-it/https://ecomfieldguide.com/guides/shopify-headless-when-it-is-worth-it/Shopify headless and Hydrogen from the official docs: what you build yourself, what stays on Shopify, the real costs, who needs it, and cheaper alternatives.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-managed-pricing-vs-billing-api/https://ecomfieldguide.com/guides/shopify-managed-pricing-vs-billing-api/Shopify App Pricing (managed pricing) or the Billing API? What each does, why the two conflict, the hosted plan page redirect, and suffixed app handles.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-protected-customer-data-approval/https://ecomfieldguide.com/guides/shopify-protected-customer-data-approval/Which Shopify apps need Protected Customer Data approval, how to request it, why order queries fail before it, and the Level 1 and Level 2 requirements.Fri, 23 Oct 2026 00:00:00 GMThttps://ecomfieldguide.com/guides/shopify-subscription-apps-compared/https://ecomfieldguide.com/guides/shopify-subscription-apps-compared/Loop, Recharge, Skio, Seal and Shopify's own Subscriptions app compared on published pricing, fees and plan limits, with a worked monthly cost example.Fri, 23 Oct 2026 00:00:00 GMT