Give every channel a purpose
SMS works well for concise information and a clear next step. Voice lets you explain something in a familiar tone. Ringless voicemail gives the recipient a recording to listen to later.
Choose the channel for the message and the audience. Using every channel for every step is not a requirement.
Build around timing
Campaigns support delays and date-based timing. A welcome sequence can use intervals between steps, while an appointment reminder can use a contact date field.
Review the whole sequence
Check delivery throughout the campaign. If a step is not useful, revise it or remove it. A shorter sequence with a clear purpose is easier to maintain and understand.
