Responsive design is very important for conversion and can be what makes or breaks your website’s profitability. Using a good responsive theme helps capture traffic and convert the sale. Some of the best Shopify Responsive themes include:

• Emigo: This theme is perfect for fashion stores, with a clean and modern design that looks great on both desktop and mobile devices.
• Lezada: This theme is a versatile option that can be used for a variety of stores, with a wide range of features and customization options.
• Express: This theme is a simple and easy-to-use option that is perfect for stores with a small number of products.
• Galleria: This theme is a great option for stores with a large number of products, as it features a vertical slideshow that can be used to showcase your products.

Shopify Themes can be a bit expensive with most themes running $180+ in 2023 so it may make sense to start off with a Free Shopify theme first.