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Each page of your site is made from HTML code. It is important that it is correct and should not have any errors.
["This is how the site looks through the eyes of the computer."]
Errors lead to:

  1. Negative attitude from the search engines
  2. Your site displays wrongly.
  3. Pages loads slowly

["This is how the site page may break if the order of the opening and closing tags is broken."]
We are checking:

  1. The correct order of opening and closing tags. That is, there are no such constructions <b><div></b></div>.
  2. Optimization of javascript loading. To make the page load faster, it is advisable to load scripts in asynchronous mode. It is always possible to load asynchronously, at least several javascript files. To do this, you need to add the «async="true"» attribute to the Javascript file connection tag.
  3. The page should be expanded using HTML5 semantics, that is, there should be tags <header>, <aside>, <nav>, <footer>. This improves how the searce engines understand your page.
  4. The correct doctype tag should be «<!DOCTYPE html>»