A good example of paid advertising is the Google sponsored results or PPC (pay per click). Email marketing needn't be overly complex or confusing. https://Www.kurstap.az/kurstap/countSite/29?link=http%3A%2F%2Fsites.google.com%2Fview%2Fhowmuchdoesasquarespacewebdesi%2Fhome