Mejor plataforma de opciones binarias
First, random samples of websites from each country for each type of site were generated and verified by computer programs.
Each of these sites was then manually checked to select only those that were suitable for the study. Next, all four search engines in the study were queried to find out if the engine covered a site and the exact number of pages of the site that were indexed. For all sites in the study, the number of links pointing to the site (inlinks) was also determined by querying search engines. This inlink count was analyzed as a possible factor that affects the chance of the site being indexed by search engines.