The relevance of sustainable tourism is unquestionable. Tourism and hospitality firms worldwide are moving toward more sustainable product offerings. However, not all firms communicate their achievements and commitments in this area. This study assesses the sustainable digital communication of small and medium accommodation firms and relates that information to the sophistication of their online presence. For this purpose, data were retrieved from the websites of 759 accommodation firms located in the Azores (São Miguel Island), classified as a sustainable island destination. The results indicate that international accreditations are less commonly adopted than local accreditations and that smaller firms tend to value eco-labeling when promoting their offers online. It is also noticed that sustainable achievements are highlighted on more sophisticated websites. This is one of the first studies to explore online sustainability communication; more specifically, the link with website sophistication among tourism SMEs. It is hoped that this study will stimulate further research on communication and SME practices on tourism sustainability and improve policy efforts to promote wider adoption of sound practices.

可持续旅游业的意义是毋庸置疑的。全球的旅游和酒店公司正在朝着更具可持续性的产品提供方向发展。但是，并非所有公司都传达其在这一领域的成就和承诺。这项研究评估了中小型住宿公司的可持续数字通信，并将其信息与他们在线存在的复杂程度相关联。为此，从位于亚速尔群岛（圣米格尔岛）的759家住宿公司的网站中检索了数据，这些公司被列为可持续的岛屿目的地。结果表明，与地方认证相比，国际认证的采用率较低，并且较小的公司在网上推广其产品时倾向于重视生态标签。还应注意，可持续发展成就在更复杂的网站上得到了强调。这是探索在线可持续性传播的第一批研究之一；更具体地说，是与旅游中小企业之间的网站复杂度相关的链接。希望这项研究将促进关于旅游业可持续性的交流和中小型企业实践的进一步研究，并加强政策努力以促进更广泛地采用合理的实践。