This paper is the first study that investigates the impact of balance (the ratio of positive and negative reviews) and sequence (the order in which the reviews are presented) of a set of online reviews on the perceived usefulness of these reviews (objective 1). As a second objective, our study attempts to provide more understanding in the gatekeeping role of the perceived usefulness. The results do not only evidence that review balance matters, but also reveal that review sequence has an important effect on the perceived usefulness of a set of reviews. The crucial role of perceived usefulness is demonstrated in that only when reviews are perceived as relatively useful, recall of positive and negative review information affects attitude and intention formation through the impression it creates about the object.

Based on a meta-analysis, this study aims to clarify the influence of online review valence (i.e., whether reviews in a review set are predominantly positive or negative) on various dependent variables, in particular on perceived usefulness of the reviews and on attitudes toward the product. The findings suggest that review valence affects perceived usefulness in a different way than it affects attitudes. We find an optimum impact level for perceived usefulness and a ceiling effect for attitudes. Primarily negative review sets that include few positive reviews show the strongest effect on perceived usefulness, while positive review sets that include few or no negative reviews are most successful in influencing attitudes. Additionally, review valence has a stronger influence on perceived usefulness when the reviews refer to experience (rather than search) products, and it has a stronger influence on attitudes for unfamiliar (rather than familiar) brands. Finally, the strongest influence of review valence refers to recommendation intentions. These findings provide several implications for researchers and practitioners.

Using a six-dimension uses and gratifications (U&G) framework, we explore how social media use motivations drive consumers’ online brand-related activities (COBRAs: consumption, contribution, and creation of brand-related content). We examine these relationships for different social media types by drawing on two previously suggested dimensions, namely their nature of connections and level of customization of messages. Using a US-based sample ( n = 939), findings of a PLS-SEM procedure show that “traditional” U&G hardly explain social media COBRAs. In contrast, Empowerment and Remuneration motives—two U&G specifically relevant for social media use—are the most critical COBRAs drivers. Multigroup analyses suggest that the relation between U&G and COBRAs differs between social media platforms classified either as: (a) profile- or content-based; or as employing (b) customized or broadcast messages. We argue for a specific design of brand-related activities on different social media in order to incentivize users’ engagement with brand-related content.

We study the impact of perceived personalization on consumer responses to advertising on Facebook, a popular social network site (SNS). Based on two experiments, we test a moderated mediation model with perceived relevance as the mediator and respondents' attitudes toward Facebook as the moderator of the relationship between perceived personalization on one hand and brand attitude and click intention on the other. The results show that perceived personalization improves responses toward Facebook ads, through perceived relevance. The moderating impact of attitude toward Facebook is significant only in the second study. There, the positive effect of perceived personalization of Facebook advertisements on click intention is stronger for participants with more positive attitudes toward Facebook.

We study the effect of perceived personalization in advertising on social networking sites (SNSs) on consumer brand responses. In study 1 (N = 202), we test a parallel mediation via perceived personal relevance and intrusiveness on brand attitude (Ab) and click intention (CI). Perceived personalization improves Ab and CI by increasing the perceived personal relevance and, unexpectedly, by decreasing the perceived intrusiveness of the ad. Study 2 (N = 264) extends the processing mechanism of personalized advertising by additionally including the mediating effects of self-brand connection and reactance toward the ad. Perceived personalization has a positive indirect effect on self-brand connection via perceived personal relevance, but not via perceived intrusiveness. Self-brand connection, in turn, has a positive effect on consumers’ responses. Contrary to expectations, reactance does not significantly affect brand responses. Study 2 also examines the moderating role of perceived privacy protection by the SNS. Higher levels of perceived privacy protection by the SNS do not strengthen the indirect effects of perceived personalization.