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Guides, checklists, and tactical tutorials for marketers and developers: UTM tracking, GA4 setup, A/B testing, and practical SEO workflows.
vCard 3.0 vs 4.0, required vs optional fields, photo encoding limits, iOS and Android compatibility, and batch generation for sales teams.
mailto URI parameters, URL encoding rules, template vs freeform body strategies, email client compatibility, and QR density limits for print.
smsto vs sms URI formats, iOS and Android message handling, pre-fill best practices, short codes vs long codes, and MMS limitations.
tel URI format rules, country code formatting, mobile-only limitations, fallback strategies for desktop, and call tracking via landing pages.
geo URI vs Maps links, coordinate accuracy by decimal places, label parameters, cross-platform testing, and indoor location workarounds.
Practical guide to qr code print size: formulas, workflow, implementation pitfalls, and a direct execution playbook with QR Generator.