Online platforms such as Amazon’s Mechanical Turk (MTurk), CloudResearch, and Prolific have become a common source of data for behavioral researchers and consumer psychologists alike. This chapter reviews contemporary issues associated with online panel research, discussing first how the COVID-19 pandemic impacted the extent to which researchers use online panels and the workers participating on certain online panels. The chapter explores how factors like a TikTok video can impact who uses these online panels and why. A longitudinal study of researcher perceptions and data quality practices finds that many practices do not align with current recommendations. The authors provide several recommendations for researchers to conduct high-quality behavioral research online, including the use of appropriate prescreens before data collection, data analysis preregistration practices, and avoiding post-screens after data collection that are not preregistered. Finally, the authors recommend researchers thoroughly report details on recruitment, restrictions, completion rates, and any differences in dropout rates across conditions.