Mobile devices are undeniably the primary means of navigating the world. However, understanding the challenges of communicating across all devices can be challenging. Does your email blast look great on the variety of current smartphones? Is your website designed to present your information in the best format for smaller digital platforms? We test email messages, websites and landing pages across multiple devices and browsers to avoid surprises when your message goes live.
Source: https://www.pewresearch.org/internet/fact-sheet/mobile/
a marketing strategy should meet goals.
if you find that yours is coming up short it is time to learn why.