Email Marketing is the world’s cheapest way to get leads. Even clients can do buy own. It is the fastest way to reach people. But the issue is you must have people’s valid database as your industry, Geography, interest, etc. If you buy this data from any website. 80% of Emails Ids are Invalid. If you hit a campaign, your Email id will be marked as Spam. It will take time to collect the people’s Emails id as per your industry, Geography, interest, etc.