Alex , along with the not 100% accurate data is deemed reliable data that give approximate and allows us to have an idea about the approximate site . So if a site says that Alexa ranks among the top 1000 sites in Turkey , the site in approximately one order. Data provided by Alexa rankings are considered seriously by advertisers. Advertisers , when they advertise on a website , they refer to an independent measurement tool that Alexa data. Advertisers want to take part in the high number of visitors to the site naturally. Alexa data can also be used to evaluate the SEO expert. Alexa website looking at the value of an SEO expert is doing SEO work , how we can have an idea about his successful work.