Search engines see a domain and its subdomains as two different websites. This can cause them to see duplicate content, which can negatively affect your search rankings.

The different versions of tebei.net (with and without www. ; http and https ; even with and without trailing slash) do not direct traffic to the same URL. A fix is crucial.

Use the rel="canonical" tag to tell search engines which is the definitive version of your page. Use a 301 redirect to divert traffic from any secondary domain.

Alt text is the written copy that appears in place of an image on a web page if the image fails to load on a user's screen.

This text helps screen-reading tools describe images to visually impaired readers and allows search engines to better crawl and rank your website.

tebei.net has 11 images with a missing alt attribute.

Although Google says social media is not a direct SEO ranking factor, the correlation between social signals and ranking position is extremely high.

Social media affects SEO in the sense all of the shares add up to more visibility for your content.

If lots of people share your content, then it’s likely more people will link to it, and links are a very important SEO ranking factor.