How to improve FID on your site after monetization.

Improving First Input Delay (FID) on your site after monetization is crucial for maintaining a good user experience. FID measures the time it takes for a page to respond to a user’s first interaction (like clicking a link or button). Here are several strategies to enhance FID while ensuring your monetization efforts do not negatively impact performance:

1. Optimize JavaScript Execution

• Minimize JavaScript: Reduce the amount of JavaScript that needs to load before the page becomes interactive. Remove any unused code and minimize scripts where possible.
• Defer and Async Loading: Use defer or async attributes on your script tags to prevent blocking the main thread. This allows the browser to load JavaScript without delaying the page’s initial rendering.

html
<script src="your-script.js" defer></script>

2. Prioritize Critical Scripts

• Load essential scripts for initial interactions first. Non-essential scripts can be loaded later, after the main content has loaded.

3. Optimize Third-Party Scripts

• Be mindful of third-party scripts, especially ads and tracking scripts, as they can slow down FID. Use lightweight alternatives or load them asynchronously.
• Consider using a tag manager to control when and how third-party scripts are loaded.

4. Reduce Main Thread Work

• Limit the complexity of tasks running on the main thread during the page's initial load. Break up long tasks using techniques like requestIdleCallback to improve responsiveness.

5. Implement Lazy Loading

• Use lazy loading for images and iframes to defer loading of off-screen content. This reduces the initial load time and allows users to interact with the page sooner.

html
<img src="example.jpg" loading="lazy" alt="Example">

6. Optimize Your Web Fonts

• Load fonts efficiently by using font-display: swap; in your CSS to ensure text remains visible during font loading. This prevents delays in rendering text and improves FID.

css
@font-face {
    font-family: 'MyFont';
    src: url('myfont.woff2') format('woff2');
    font-display: swap;
}

7. Improve Server Response Times

• Optimize your server response time to ensure that the HTML is delivered to the browser quickly. This includes optimizing your hosting environment and using caching strategies.

8. Reduce Resource Size

• Compress resources (images, CSS, and JavaScript) using tools like Gzip or Brotli. Smaller resource sizes reduce load times and improve responsiveness.

9. Use a Content Delivery Network (CDN)

• Implement a CDN to serve your content from locations closer to your users, reducing latency and improving load times.

10. Monitor Performance Regularly

• Use tools like Google PageSpeed Insights, Lighthouse, or WebPageTest to regularly monitor your site’s performance, focusing on FID. Adjust strategies based on the data you collect.