Can the work of several SEOs within the same site interfere with each other?

Question

Search Engine Optimization

The organization is engaged in installation work of various kinds. Each type of work is dedicated to a separate page on the site. It is supposed to hire several different studios / specialists for each type of work and thus compare the effectiveness of SEOs and choose the most effective one from them.

Answer 1

I'll try offhand, without going too deep, to suggest why this undertaking may not bring the desired result.
List of reasons:

• There is a list of works on the site that cannot be done separately, because. errors lead to search engine sanctions that are imposed on the site as a whole. so-called. host sanctions. For example, one contractor decided to purchase links with commercial anchors and the second one did the same. As a result, a lot of external links with commercial anchors lead to the site. Outcome? Minusinsk from Yandex, a drop in traffic throughout the site as a whole. Or one of the contractors turned out to be unscrupulous and ordered a PF cheat, Yandex figured it out and the site completely lost its positions for 8 months. Etc. etc.;
  
• There are changes on the site that may not agree between the two contractors, i.e. what is good for a Russian is death for a German! For example, the site is an online store. One of the contractors decided that it was necessary to change the layout of product cards, add the "indexed SEO filter" functionality to the category pages, and the second contractor already writes to you that this cannot be done for some reason. or it’s impossible to do exactly the way we propose the first contractor, it must be done differently .. And you created a headache for yourself, the way out of which is to stop choosing one contractor.
  

Answer 2

They won't do it themselves.

Answer 3

Somehow, we won’t succeed)))
That is, you made one another, remade it for yourself.
The third one still turned up
and how can you understand from this porridge who of them is better and more efficient?
Taking into account the fact that there are hundreds of ranking factors and the initial weight for each category will be different
. In general, the result, of course, can be calculated in the end, but this will require a lot of resources of very professional SEOs, which is very expensive
. In general, it is not necessary to develop SEO as you want. , and Yandex direct and Google adwords, they immediately paid and the result
And SEO that you pay for a whole year and only then you see an adequate result or you don’t see
Seo is not fast, the result is not very instant and requires constant work