Many agents have groups of clients and leads which need to be contacted at a regular basis.
You may want to update your best clients on new market conditions, customer appreciation events, or even free give aways from time to time.
You may have a list of leads, which you sent listing updates to.
In any case, Gmail has the ability to create multiple lists and the ability to have a contact belong to multiple lists at a time. The below video shows how it is done!
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