The subject references a specific event: a performance by the artist Meghan Trainor at the Walmart Arkansas Music Pavilion (AMP) on October 10th. This indicates a concert or musical appearance at a venue sponsored, at least in part, by Walmart. Events like this are typically organized for entertainment purposes and to draw crowds to a particular location.
Such events serve multiple purposes. For the artist, it is an opportunity to engage with fans and promote their music. For the venue, it generates revenue through ticket sales and concessions. For the sponsor, it provides brand visibility and association with a popular artist and entertainment event. Historical context would place it within the broader scope of live music performances and corporate sponsorships.