On your own, you can organize search engine promotion only if the resource is technically prepared. We are talking about the code on which a lot depends: from usability to page loading speed. If everything is in order with the code, but the pages still freeze, then you should pay attention to the hosting and change it if necessary. You should have a permanent specialist who will correct the code from time to time and remove unnecessary parts of it. Such manipulations in the future will help to implement the promotion in search engines on their own since a reliable base in the form of clean optimized code will be prepared for this.