If a country is not listed, it is because Alexa does not have enough data for this site to rank/measure the site's popularity among that country's online population. The metrics are updated daily based on the trailing 3 months.
Bounce Rate (%) Percentage of visits to the site that consist of a single pageview.
Learn more about Alexa's Data Unique Visitors and Pageviews The number of people who visit this site and the number of pages they view.
Site owners who install the Alexa Certify Code on their website can choose to display their Certified Metrics, such as Monthly Unique Visitors and Pageviews, if they wish.
Certified Site Metrics are metrics that are directly-measured from the website instead of estimated.
The website owner has installed an Alexa Certify Code on the pages of their site and chosen to show the metrics publicly.
Each computer has to have an IP number to connect with other computers. Alexa rank is a scoring framework that measuring an activity and making characterization as per this movement those Alexa Toolbar clients are going to sites.
That's why you should use alt tag on your all pictures, which you use in your website.
It's crucial to use alt tag and to make sure search engines know what you are talking about.
It's very important to use pictures on your website to bring up the main concepts of your website. Search engines understand the pictures by their alt tags.
If there is no alt tag, search engine doesn't understand anything from the image.