First of all, let's make a small clarification by making the difference between free audit and paid audit. Or rather between automatic audit and manual audit. Some websites, like Woorank or Yakaferci offer you free audits (with some paid functions) of your site.
You enter the address of your website and abracadbra , you know everything that is wrong. russia whatsapp data
In reality, these online softwares automatically audit your site. It checks a series of points one after the other. For example:
Meta tags
Title tags
page length
But also some more technical points:
url canonicalization
html code compliance
Woorank, for example, offers nearly 70 criteria!
All these criteria can be automatically checked by a computer, which then tells you what needs to be optimized.