Final answer:
Companies implement social media etiquette training to reinforce branding, ensuring a strong brand reputation for higher customer loyalty and the ability to charge premium prices.
Step-by-step explanation:
The underlying reason for implementing these recommendations of social media etiquette and monitoring is primarily Branding. By training employees and managing social media interactions, businesses aim to build a strong brand reputation, which is crucial for attracting repeat customers and getting referrals. Companies that demonstrate they care about their reputation are less likely to be perceived as providers of poor-quality products or services, and can even charge higher prices based on their positive standing in the market.