Let's see some of them, which in my opinion are more representative of the concept of quality.

[arafatenzo]

Effects of Panda Algorithm Updates on Websites
Now the situation is a little different, for two reasons:

On the one hand, Google has decided to no longer officially announce the release of new updates , as well as other major anti-spam updates, such as Penguin , the Page Layout Update, etc.
on the other hand, it must be said that the updates connected to Panda are so many and are often linked to many other small structural or anti-spam updates (always not made official by Google, but the result of SEO speculations) that it becomes really difficult to be certain of the type of algorithmic filter to which a site is subject.
In the absence of official announcements and the israel phone number certainty of being subject to Panda or not, the procedure to apply is the precautionary one , as is done with vaccines. Therefore, try to treat the symptoms before the disease appears, in terms of content and quality of the site, and the same should be done for links. After all, an old saying goes: "Prevention is better than cure" . Treating a site sensitive to Panda (or Penguin) and getting it out of the penalty, I assure you that it is not an easy activity and not within everyone's reach.

Internal duplication and technical management
We now come to another problem that arises especially for sites created using CMS ( Wordpress , Joomla) and for large sites, such as an online shop.

The problem of duplicate URLs
As we have seen before, the duplication of internal URLs has little to do with quality problems of the page that translate into the presence of poor content and of little value for the user. This does not change the fact that offering users and, above all, search engines dozens or hundreds of URLs that present the same content is not a good experience for the visibility of your site.