Should I spend more on advertising or improve how I handle the inquiries I already get?
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Look for the first part of the customer journey that is not working. If suitable people rarely find you, reach may be the issue. If good inquiries arrive but sit unanswered or get lost between tools, more advertising may increase the same problem.
Review a sample of recent inquiries from arrival to outcome. Improve the part you can identify, then measure it before expanding the budget. You may need advertising, a better website or form, or more reliable follow-up—not necessarily all of them.
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