Shopify theme-based development refers to the process of creating or customizing a theme on the Shopify platform to design and build an online store. Shopify themes are pre-built templates that can be customized with your branding, colors, and content to create a unique online store. Shopify themes can be designed by professional designers or purchased from the Shopify theme store.
Theme-based development involves using HTML, CSS, and JavaScript to modify the layout, style, and functionality of a Shopify theme. This can include adding new features, customizing existing features, or integrating third-party applications to enhance the functionality of your online store.

Some common tasks involved in Shopify theme-based development include:

• Customizing the layout and design of the theme to match your branding and visual style.
• Adding or modifying features such as product pages, collections, navigation menus, and checkout pages.
• Integrating third-party applications such as email marketing tools, social media widgets, or shipping calculators.
• Optimizing the performance of the theme by minimizing page load times and optimizing images.

Shopify theme-based development requires knowledge of HTML, CSS, JavaScript, and Liquid, which is Shopify's templating language.

Custom theme development on Shopify refers to the process of creating a unique, custom-designed theme for an online store using the Shopify platform. This involves creating a new theme from scratch or modifying an existing theme to match the specific needs and branding of a business.
Custom theme development typically involves the following steps:

• Requirements gathering: This involves understanding the needs and preferences of the business and its target audience, as well as identifying any technical requirements or limitations.
• Design: This involves creating a visual design for the online store, including the layout, colors, typography, and other design elements.
• Development: This involves using HTML, CSS, JavaScript, and Shopify's Liquid templating language to build the custom theme. This includes creating custom templates for pages, collections, and products, as well as integrating any third-party applications or functionality.
• Testing: This involves testing the custom theme to ensure that it functions as intended, is compatible with different devices and browsers, and meets all requirements and specifications.
• Launch: This involves launching the custom theme on the Shopify platform, configuring any settings or integrations, and making any necessary adjustments based on feedback and analytics.
  
  Custom theme development on Shopify can be a complex process that requires technical expertise in web development, design, and Shopify's platform.