Tender for The purpose of this contract is the provision of technical maintenance service as well as the management of content, taking into account the SEO positioning and web portal analytics of aralleida.cat and its eight microsites in four languages (Catalan, Spanish, English and French). The contract is divided into two lots: Lot 1: technical maintenance services for the web portal and its eight microsites, which includes programming, content migration, design and layout of new pages, as well as their technical SEO optimization. Lot 2: services for the creation, updating and curation of web content, the application of the SEO positioning strategy related to the content and the web analytics of the portal aralleida.cat and its eight microsites, which includes data collection, its interpretation and the application of improvements to the different web platforms.