Time and again, people make the same mistake. Online ads work if you are selling a more-or-less commodity. If your product is a propane tank, paying for AdWords

Time and again, people make the same mistake. Online ads work if you are selling a more-or-less commodity. If your product is a propane tank, paying for AdWords to be #1 whenever anyone googles "buy a propane tank" will generate leads (whether acquisition costs would make sense is another story). If you have just designed an AI-powered robot for welding propane tanks, you won't get a single lead via AdWords. Your best bet is trade shows and sales people who know people inside companies that need to weld propane tanks.