It will take some time but everything should be back to normal. Content abandonment A critical mistake is abandoning the content from the previous version of the website and writing everything from scratch. While there will be no great tragedy if the new texts are similar in terms of structure and keywords the problem arises when most of the content or entire subpages are missing. You need to realize that content is what makes a website appear on Google. Specific texts are the answer to queries typed by Google. If you take away the answer from the page your page ceases to be a carrier of information that Google considers important and you disappear from the search results.
The solution to this problem is to plan the new website in a way that is consistent with the SEO strategy which guarantees no loss of traffic and even its increase and Latest Mailing Database leading to a situation where the website will start acquiring many more customers. No redirects Another important mistake is not performing redirects. If you dont Google will have to learn new addresses on its own. It will take weeks or even months so you will waste time unnecessarily.
In addition all links that lead to you from the outside other websites articles forums social media etc. will indicate a error. Instead of finding a new equivalent of a given subpage customers will see the error and quickly disappear without the possibility of submitting a query. The solution to this problem is to make a redirect map that will take into account all URLs. The second element is the correct execution of these redirects taking into account the correct code in this case it must be a redirect. No postdeployment testing In most cases the moment of implementing a new website is the last moment to focus on the migration aspect.