The book I read to research this post was Creating Fat Content by Dr Andy Williams which is a very good book that I bought from kindle. This book is around 220 pages so is fairly and is about writing online content that will rank high in the Google search engine. Google calls websites with lots of search terms but little actual content thin sites hence the title of this book having the word fat. There have been literally hundreds of updates to the acronyms used by Google over the years. At one time search engines merely looked for how often a word or phrase was repeated in a website article and ranked accordingly. This led to many highly ranked spam sites with little content. Then they started looking for appropriate domain names which again had a similar result. Google with there acronyms which try to decipher the actual content on a site was a game changer and they bought one company that had come up with an even more intelligent way of organising these sites and incorporated it into the search engine. Currently Google downgrades sites that scrape content from elsewhere or repeatedly break copyright infringements. They try to identify the writers of content so it isn’t worth hiding behind a web identity. They rank trusted content higher particularly popular brands. They also look at do you add useful content as it is no good embedding articles and youtubes which they regard as being available elsewhere. When you enter a search term you will often see popular youtube videos on the youtube site highly ranked. They also look at the number of links and interaction with your site but penalize sites that swap links. This book is really interesting and I learnt a lot from it and do recommend it.