The present paper tackles two major phenomena of today's world -online migration and the need for sustainable behavior, both in a business-to-business approach. First of all, online presence is becoming indispensable for all businesses, considering that consumers have developed a first-online check-up for every need and potential purchase, even more, if we consider the outcome of the last two-years pandemic, where we consider the outcome of the last two-years pandemic direct contact is avoided. Thus, the need for online marketplaces, where supply and demand can be balanced, is becoming a paramount priority for all marketing and management specialists. Secondly, sustainability is the future; thus, every specialist must think of ways to implement such a judgment in their business model. One of these ways is transforming most processes to be tailor-made in the online environment. We have developed a concept for an online marketplace where specialists from marketing and management can offer their services as suppliers and find the needed services as clients. To develop a high-quality platform, we have first identified the specific needs of marketing and management specialists when dealing with research and consultancy. The present paper presents the results of two researches: qualitative research conducted among such specialists to identify what the new platform should offer and usability test market research to see if the online marketplace fits the specialists' expectations. These are mandatory steps in every new product development; thus, we hope to be a proper example for future businesses.

Companies are now integrating social media marketing into their strategies and policies, for a better business performance. Social media campaigns are cost-effective and flexible in operations, offering many benefits. Between 15 -30 August 2020 we created and managed a Facebook campaign for a local fashion brand. The online marketing becomes even more valuable in COVID-19 crisis, people shop and spend online more than ever. The marketing campaign generated important data to understand the customers demographic, interests, actions and helps us to make profiles of the potential clients. In this context we analyzed the conversion rate indicator, to understand if the marketing campaign was efficient or not. Conversion rate may not be the best to measure the success, but it is a great tool for tracking performance. We propose also the ROAS indicator, to measure the success of this marketing campaign

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