Most people claim that they would definitely prefer to lose their wallet before losing their phone. Although the phrase may seem a bit of an exaggeration, it encompasses part of the reality that we often do not see, or that we do not want to see, specifically the amount of information which we have on our smartphone and the capacity that we have to obtain information immediately. Online communication has led to instantaneous information searches, both personal as well as professional. This new digital channel has given rise to an exponential growth of the data stored on the network so that end users can get to know what is happening in any part of the world at any time. Connected to this increased amount of information available, so-called influencers have appeared, who use this new on-line channel and do image-based digital marketing linked to a company, brand or product. Their followers (previously known as fans...) are potential product purchasers. As such, managing this digital asset is very important for companies and their marketing departments. Properly utilising and following up on influencers can greatly help to generate higher sales through a digital marketing channel that still has a long road ahead of it.

The loss of influence of conventional media, due to the emergence of the Internet, has increased the concerns of brands in terms of ascertaining how to influence different segments that exist in Spain. However, there is a factor that continues to influence people: the opinions of third parties (formerly offline and now also online). Therefore, it is interesting for brands to analyse new opinions transmitted online by third parties, that may also be influencers and who are the focus of this study.

With this in mind, this research focuses on the perception of women between 25 and 45 years old, (a segment of Spanish society – the target group) of the Sense Girls (as key influencers in the fashion, beauty and Fitness/Life & Style sectors, important for the target group) on YouTube and Instagram, focusing on how they communicate and how they could be taken into account in the field of marketing/communication.

Since this information could not be obtained from secondary sources, an ad hoc quantitative (questionnaire) and qualitative (focus group, in-depth interviews, channel analysis) investigation has been carried out.

As a result of this research, it can be concluded that the Sense Girls should be used in the marketing strategies of brands, differentiating communication types for each of the clusters into which women between 25 and 45 are divided.