Technical SEO Checklist: From Site Speed to Schema

Success in digital marketing requires more than just content and backlinks; your site’s infrastructure must also meet search engine standards, meaning it must comply with technical SEO criteria. In 2025, Google’s algorithms place increased importance on technical details. Elements like site speed, core web vitals, and schema markup are among the top factors that directly impact your ranking. In this guide, drawing from the expertise of Yastık Medya and Postun Hazır, we will present a comprehensive and practical technical SEO checklist.

What Is Technical SEO and Why Is It Important?

Technical SEO involves the infrastructure work done to help search engines crawl, index, and enhance the user experience of your website. Alongside quality content, fast loading, mobile compatibility, and adherence to technical standards provide ranking advantages.

Key Technical SEO Trends for 2025

• Core Web Vitals: Performance metrics developed by Google to measure user experience, essential for technical SEO.
• Mobile-First Design: Prioritizing the mobile version over desktop for evaluation.
• Schema and Structured Data: Helps search engines better understand your content.
• HTTPS Security: Google favors secure sites.

Core Web Vitals: Performance and User Experience

Core Web Vitals measure page loading speed, interactivity, and visual stability, including three main metrics:

1. Largest Contentful Paint (LCP)

Time taken to load the largest content element on the page. Ideal is under 2.5 seconds.

2. First Input Delay (FID)

Time from user’s first interaction to page response. Target is under 100 milliseconds.

3. Cumulative Layout Shift (CLS)

Measurement of unexpected layout shifts during loading. Ideal value is under 0.1.

Yastık Medya recommends customers continually track these metrics using Google PageSpeed Insights and Search Console.

Practical Steps for Site Speed Optimization

1. Choosing Server and Hosting

A fast and reliable hosting service directly impacts site speed. According to Postun Hazır's experience, using a CDN also improves performance for global users.

2. Image Optimization

Reduce load time by compressing images and using WebP format.

3. Code Minification and File Compression

Minifying CSS, JavaScript, and HTML files and enabling gzip compression improve site speed.

4. Browser Caching

Allowing site files to be cached after users visit improves loading speed on subsequent visits.