Moving an existing website to a new domain is needed when you:
- decide to add a mobile version of the website (one of the key ranking factors for Google);
- want to improve the connection security and move your website to https (a must if you accept online payments);
- choose to buy a new server for your website (for example, if you’ve found a better hosting option);
- rebrand and change the name of your company; or
- want a nicer website address that reflects the name of your company better.
Moving your website without losing traffic or rankings is entirely possible
https://semantica-ltd.com/services/seo-website-migration/. You won’t have to go back to square one with promotion.