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SEO Checklist for Developers

Server-side Rendering (SSR)

Implement server-side rendering to ensure search engines can crawl and index content.

Use tools like Next.js or Gatsby.js that provide SSR capabilities out of the box.

Mobile-Friendliness

Test the mobile-friendliness using tools like Google's Mobile-Friendly Test.

Code Splitting and Bundle Size

Implement code splitting techniques to optimize bundle size.

Reduce unnecessary dependencies and remove unused code.

Use tools like webpack and Babel to optimize your React.js code.

Image Optimization

Optimize images by compressing them to improve page load speed.

Alt tags for images (SVG).

Image title is must be write.

Page Speed

Minify CSS and JavaScript files, and optimize images.

Use caching techniques and content delivery networks (CDNs)

Use

https://pagespeed.web.dev/⁠

https://gtmetrix.com/⁠

⁠

Choose a fast hosting provider

Enable lazy loading

Remove render-blocking Javascript

Optimize database

Uncompressed JavaScript and CSS files Issue

Uncached JavaScript and CSS files Issue

JavaScript and CSS total size that is too large Issue

Too many JavaScript and CSS files Issue

Header Tags (H1, H2, H3, etc.)

H1 tag on top of the Page. It is used only one time on a particular page.

Utilize H2, H3, and subsequent tags to organize subheadings and sections.

URL Structure

Create clean and readable URLs that reflect the content hierarchy.

Use hyphens to separate words in the URL.

Example:

www.linearloop.io⁠

⁠

www.linearloop.io⁠

/blog

⁠

www.linearloop.io⁠

/blog/blog-1

⁠

www.linearloop.io/contact-us⁠

⁠

www.linearloop.io/services⁠

⁠

http://www.linearloop.io/service-1⁠

⁠

It must be less than 3 clicks

URLs are longer than 200 characters

Dont use Underscores in the URL

Meta Tags

Meta Title, Meta Description, OG Title, Og Description and Alt Image Tag

Sitemap and robot.txt

Auto Sitemap creation

Robot.txt file

HTTPS

Force HTTP to HTTPS

HSTS - Force

www.linearloop.io⁠

to linearloop.io (vice versa)

Low text-HTML ratio

Redirect

Permanent Redirect 301

Temporary Redirect 302

303, 307, and 308

Redirect chains and loops Issues

Correct File Format

Image - Webp, SVG

Video- MP4

Minify code

Javascript Reduce code or remove unused code

Broken JavaScript and CSS files

Accessibility

Make sure your img tags have alt attributes.

Analytics and Tracking

Setup Google Analytics, Google tag manager, GSC, Fb pixel code

Google search console

Canonical URL

Create Canonical URL tag

Staging Site Issues

Mark as no index, so search engine dont crawl

Security

Add good security protocols or necessary plugins installed

HTML Tags

Example: <title>, <body>, <h1>, <h2>, <h3>, <p> (paragraph), <a> (link), <img> (image)

HTTP Status Code and SSL Certificate

1xx information (100-199)

2xx successful (200-299)

3xx redirection (300-399)

4xx client error (400-499)

5xx server error (500-599)

Hreflang

Wrong Country code added values

Incorrect hreflang links

Important Pages

404 Error Page

Thank You Page

DNS resolution issue

When our crawler can't resolve the hostname when trying to access your webpage

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