Recommendation systems can today help users to find what they are looking for in an online store or online service. The companies want to create engagement with the recommendations in the form of interactions. The aim of this thesis is to investigate how to create engagement from the users. For this, the concept of a system will be made. The concept will build on knowledge and data gathered from interviews of owners of an online store or online service and a survey, where the respondents are customers. The results show that different types of information and recommendations fit in different types of situations. That the content of emails needs to stand out in order to create engagement. If the product or service is something that the customers often search for themselves then it is a good option to advertise this through the companies own channels such as web page or app. If the product is something that is more general an ad on social media can be one way to advertise it in order to create engagement from the customers.