we run a B2B e-commerce website based in Moscow where we sell commercial kitchen equipment and provide technical service. like our site is around 6 years old and pulls in an average of 45,000 organic visitors a month. the design and UI are super outdated now, mobile is practically unusable, and customers keep getting stuck during checkout. we want to go through a full website redesign without putting all this search engine traffic at risk.
we sat down with two local digital agencies; one quoted 650,000 RUB the other 900,000 RUB. both keep saying "dont worry your traffic wont drop," but they barely touch on the technical details or the migration plan but our site has hundreds of products categories, and technical articles that have been indexed for years.
what exactly should a redesign cover, and which pages should we strictly leave untouched to protect our current traffic and rankings? how should the URL and redirect structure be set up, and what technical questions should I ask the agency during contract talks to avoid an SEO disaster?