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What are the best practices of building responsive web design?
These are some of the best practices of building responsive web design.

1. Easy to find CTA: A CTA (or call-to-action) is a vital part of any successful website. Oftentimes, companies rely on CTAs to encourage users to click into their pages or sign up for a newsletter, and many other similar things! While the design and placement of a CTA can differ depending on its purpose, one thing remains certain; a well-designed CTA draws attention more effectively than an unreasonably placed one does.
2. Use SVG & responsive images: Designing logos and images for your website can be time-consuming. You might want to have a high-resolution image for your site that doesn't pixelate when the user zooms in. However, those images can come at a cost of increased loading time.
   For SEO purposes, your website should have a loading time of less than 2 seconds. You can use a smaller image of less resolution, but that might pixelate when the viewer zooms in. So, what's the solution for this problem?
   The answer is scalable vector graphics - SVG images.
3. Dimensions of buttons: The most important question of responsive web design is – how big should I make a button? For mobile and tablets, the buttons should be large enough to tap with the fingers.
   Research on button spacing and sizing found that users faced the lowest accuracy on less than 42 pixels. Buttons that are larger than 72 pixels also had quite a low accuracy. The most preferred button size was found to be 60 pixels. And the optimum range of button sizes lies between 42 and 72 pixels.
4. Use of lightweight frameworks: There are many different web design frameworks available, but Bootstrap is one of the most popular due to its wide range of responsive elements. However, Bootstrap can be quite slow to load due to its large size. This can be a major downside for website visitors.
   These are some of the lightweight CSS frameworks that can help us with responsive web design:
   - UIKIT
   - BULMA CSS
   - Mini.CSS
   - Skeleton
   - HiQ
5. Cross browser testing: Cross Browser Testing is a type of testing to verify if an application works across different browsers as expected and degrades gracefully. It is the process of verifying your application’s compatibility with different browsers.