Multi-channel is the strategy that supports an engagement solution that works seamlessly across all media.
Multi-channel means using different communication channels (such as email, phone, social media, web chat, etc.) to reach and interact with customers and prospects. Multi-channel helps to increase customersatisfaction, loyalty, and retention by providing them with convenience, choice, and consistency.References:https://www.
salesforce.com/resources/articles/multichannel-marketing/#multichannel-marketing-definition