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Developing Progressive Web Apps (PWAs) can be challenging. You need to ensure they work well across different browsers, manage offline functionality, and maintain good performance on a variety of devices. There are also security concerns, such as protecting user data.

To address these challenges, it's important to follow best practices. Make sure your eCommerce Progressive Web App is responsive, use service workers to enable offline access, and test regularly on different platforms. For security, always use HTTPS and strong encryption methods to safeguard user data.

• Avoid scams by acting locally or paying with PayPal
• Never pay with Western Union, Moneygram or other anonymous payment services
• Don't buy or sell outside of your country. Don't accept cashier cheques from outside your country
• This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"