Conclusion
Social media (Snapchat and WhatsApp) seem to be promising tools for promotional interventions to improve public health and dental knowledge among pregnant women, as well as with other health care topics. However, Snapchat is not superior to WhatsApp in terms of effectiveness. Snapchat is easy and popularly used among people with different socioeconomic statuses, and it was found to result in good retention of oral health knowledge for short term. Nevertheless, further studies are needed to generalize this study’s results, and to assess the longevity of such intervention (short- or long-term impact). This might give better insight to invest more in such interventions in the future.