Widely regarded as the top place for programmers, W3Schools boasts a ton of coding examples for HTML, Python, PHP, and much more. This is the place to find great examples of programming in HTML, ...

Learn how to optimize your HTML code to improve website speed in your portfolio. Discover how to minify, validate, optimize, load, link, and compress your HTML files.

In general, coding-related problems are tucked away from view in the HTML code. Because most sites are templated, the errors will be multiplied across every page that shares the templated structure.