OptimizeWP

Google has been using pagespeed as a ranking factor since 2010 . And in 2018, Google raised the bar with the Pagespeed update . Website speed affects user experience and conversion rates.
Why is the web speed slow, SEO rankings decrease? Page load speed is determined by various factors, including web code optimization, Hosting/Server Cache and image optimization.
This plugin will do Optimize & Speed ​​Up WordPress Website as bellow:
<ul>
<li>Minify Javascript and CSS</li>
<li>Create & Optimize Critical CSS</li>
<li>Optimize Google Fonts</li>
<li>Optimizing Lazy-loading</li>
<li>Enable Gzip compression</li>
<li>Remove render blocking resources</li>
<li>Reduce HTTP requests</li>
<li>Advanced Web-App optimization techniques</li>
<li>PageSpeed ​​Insights >90-100 (95% URLs, Mobile & PC) 
Core Web Vitals (LCP, FID and CLS) improve gradually after 28 days Validate the fix.Percentage pass depends on Device & User Network.</li>
<li>Improved web speed</li>
<li>No broken interface layout, no loss of image quality, no feature conflicts</li>
<li>Update theme/plugin does not reduce Pagespeed</li>
</ul>
Social: <a href="https://www.youtube.com/channel/UCPNgZ3jIwawHlu_iBN1Pa8A" rel="nofollow ugc">Youtube channel</a> 
User manual: <a href="https://tailieu.wp2speed.com" rel="nofollow ugc">https://tailieu.wp2speed.com</a> 
Developer: <a href="https://docs.wp2speed.com" rel="nofollow ugc">https://docs.wp2speed.com</a>

WP2Speed Faster – Optimize PageSpeed Insights Score 90-100

WP2Speed ​​is a Google PageSpeed ​​Insights speed optimization plugin. Use it to speed up your WordPress site, improve SEO rankings, and reduce Google …

Easy Critical CSS

Seth Alling

Easy Critical CSS is a lightweight WordPress plugin that allows you to add Critical CSS to any page on your site, improving your site’s loading speed and performance.
Features: 
– Easily add Critical CSS and Secondary CSS to any page 
– Secondary CSS removes all unused CSS rules and stylesheets, ensuring only a single optimized CSS file loads 
– Supports posts, pages, archives, and taxonomy pages 
– Fully compatible with caching plugins (WP Rocket, W3 Total Cache, WP Super Cache, etc.) 
– Customizable settings for individual pages 
– Stores Critical CSS in your choice of the database or as static files 
– Optional API service (API key required) for automated Critical & Secondary CSS generation through <a href="https://criticalcss.net/" rel="nofollow ugc">CriticalCSS.net</a> 
– Background processing to for smooth, non-blocking performance
<h3>Why Use Critical CSS?</h3>
Critical CSS ensures above-the-fold content loads first by reducing render-blocking styles. This helps you boost Core Web Vitals, improve page speed scores, and deliver a better experience to your visitors.
Want to try it out first? You can generate free one-off Critical CSS at <a href="https://criticalcss.net" rel="nofollow ugc">CriticalCSS.net</a> and manually apply it to your site using the plugin settings.
<h3>External services</h3>
This plugin interacts with external third-party services in order to provide its functionality. Below is a detailed breakdown of these interactions:
<ol>
<li>
Critical CSS API (api.criticalcss.net) 
This service generates critical and secondary CSS used to optimize your site’s CSS delivery and improve page load times.
<ul>
<li>Data Sent: The URL, CSS generation preferences, generation status, and HTML content of pages from your website.</li>
<li>When: Data is transmitted only if you have explicitly enabled the Auto generation mode, and occurs whenever Critical CSS or Secondary CSS needs to be generated or regenerated.</li>
<li>Links: <a href="https://criticalcss.net/terms/" rel="nofollow ugc">Terms of Service</a>, <a href="https://criticalcss.net/privacy/" rel="nofollow ugc">Privacy Policy</a>.</li>
</ul>
</li>
<li>
Cloudflare API (api.cloudflare.com) 
This service is used to automatically clear your Cloudflare cache after new critical CSS is generated, ensuring your visitors see updated styles immediately.
<ul>
<li>Data Sent: Authentication credentials (Cloudflare email, API key, and zone ID) and instructions for purging the cache.</li>
<li>When: Data is sent only if <code>CLOUDFLARE_EMAIL</code>, <code>CLOUDFLARE_API_KEY</code>, and <code>CLOUDFLARE_ZONE_ID</code> are defined in your site’s configuration.</li>
<li>Links: <a href="https://www.cloudflare.com/terms/" rel="nofollow ugc">Terms of Service</a>, <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Privacy Policy</a>.</li>
</ul>
</li>
<li>
Kinsta Cache Clear (localhost) 
If your site is hosted on Kinsta, this plugin can trigger a cache clear after generating new critical CSS, ensuring immediate availability of updated styles.
<ul>
<li>Data Sent: A cache-clear request to your site’s local server endpoint provided by Kinsta. No sensitive or identifying information is transmitted beyond the local environment.</li>
<li>When: Data is sent only when your site detects that it’s running on Kinsta infrastructure (<code>KINSTA_CACHE_ZONE</code> environment variable is present).</li>
<li>Links: <a href="https://kinsta.com/legal/terms-service/" rel="nofollow ugc">Kinsta Terms of Service</a>, <a href="https://kinsta.com/legal/privacy-policy/" rel="nofollow ugc">Kinsta Privacy Policy</a>.</li>
</ul>
</li>
<li>
Freemius API (api.freemius.com and wp.freemius.com) 
Used to manage licensing, validate API keys, and handle plugin updates and account management.
<ul>
<li>Data Sent: Freemius sends and receives licensing information and plugin activation status, including your site’s URL, plugin version, API key, and licensing details.</li>
<li>When: Data is transmitted only after explicitly opting in through the plugin’s settings page or upon activation of a purchased API key. By default, the plugin does not send any data to Freemius.</li>
<li>Links: <a href="https://freemius.com/terms/" rel="nofollow ugc">Freemius Terms of Service</a>, <a href="https://freemius.com/privacy/" rel="nofollow ugc">Freemius Privacy Policy</a>.</li>
</ul>
</li>
</ol>

Easily inject Critical CSS and Secondary CSS (with unused styles removed) to improve site speed and performance.

WP2Speed Faster – Optimize PageSpeed Insights Score 90-100 vs Easy Critical CSS