What are the most important technical aspects in developing a web?

1 - Learning the structural language HTML is essential and must begin with.

2. CSS is indispensable and must be learned after HTML.

3 - Learn PHP language is also essential to deal with requests on the server.

4 - Learn the relational databases and learn mySQL.

5 - Learn Abeer standard Regular Expressions.

6. Learn the basics of javaScript and jQuery.

7. Learn to use JSON format.

8- Learn the AJAX technique and how to deal with it through the jQuery library and send and receive requests with PHP language.

9 - Learn the Design Patterns Design Pattern.

10 - Learn the design of modern interfaces Responsive Template and the art of color selection and optimal use of resources.

Learn bootstrap.

Learn SEO to write the best search engines.

13. Learn the Laravel Framework.

14. Create your own extensions that you need for the frame.

15. Learn Less for CSS Code Books in a Better Way.

16- Learn mustache Template system for javaScript language.

According to my exprience, this was the top technical aspect generally , 

1. Undesting the customer requirment

2. choosing the right framework for the development 

3. User Exprience 

4. Well Drafted algorithms 

5. Testing 

6. choosing the right server for deployment 

It includes different aspects like how will your code is, means how effectively you write code for your website.The code include the combination of HTML,CSS,JavaScript and many others.  

 The most commonly used technology in web development is Silverlight technology