Promoting the site

There is a website of a production company with a specific range of products for industrial enterprises. Until December 2020, they used the services of promotion of a third-party company.
The main task: to audit the current "state" of the site and offer ways (services) to increase the sites attendance when the target request from search engines Yandex and Google. Consumers of products are the entire RUSSIAN CIS.
Additional tasks: improve the appearance of the site, usability, development of a new LOGO company, compiling technical catalogs of products (for printing and posting on the site), filling the site with content.