In these days use of mobile devices and mobile internet is increasing and that is why html size is so important for a web site, we made a test and see that web4cam.com's home page is 6kb which is really good for mobile users. Keep in mind that external links are ok, but too many of them will always be problem.Social media has an important role on being popular as a website.
There is not necessarily a link between the upstream site and this site.
The "Sites Linking In" count shows the number of sites that Alexa found that link to this site.
For more information please see this explanation of how Alexa determines the number of sites linking in.
Daily Time on Site Estimated daily time on site (mm:ss) per visitor to the site.
Search Traffic The percentage of traffic, both free and paid, that come to this site from a search engine over the past 3 months, updated daily.
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.