Salfars Commerce Journalhttps://salfars.shop/Practical guides to ecommerce margins, acquisition costs and profitable growth.enA weekly Shopify marketing scorecard you can act onhttps://salfars.shop/guides/weekly-shopify-scorecard/https://salfars.shop/guides/weekly-shopify-scorecard/Bring revenue, customer acquisition, contribution and campaign changes into one short weekly review without merging incompatible attribution reports.Fri, 02 Oct 2026 00:00:00 GMTBreak-even ROAS: the calculation before your next campaignhttps://salfars.shop/guides/break-even-roas/https://salfars.shop/guides/break-even-roas/A worked contribution-margin example, a browser calculator and a checklist for setting an ad target that accounts for variable costs.Fri, 02 Oct 2026 00:00:00 GMTMER vs ROAS: read the business result alongside the campaignhttps://salfars.shop/guides/mer-vs-roas/https://salfars.shop/guides/mer-vs-roas/A practical example of why channel ROAS and total marketing efficiency answer different questions, and how to review them together.Fri, 02 Oct 2026 00:00:00 GMT