Variation 3 Many sites attempt to drive traffic to their site through social book marking and registering to search engines, a strategy known as search engine optimization... Source : Internet Marketing Online Pg. 272
Variation 2 Aside from these, an advertiser needs to know a lot about the technical side of web development, which in itself is very tedious and requires a huge amount of time and effort... Source : Guide to The Internet Pg. 110
