Some webmaster friends of mine who do SEO work often ask me: my site is updated every single day, and all the articles are original, so why does the search engine just refuse to index it? I believe many friends doing optimization run into the same problem, so today I'll analyze the reasons behind it for you all!
The new-site reason
When you build a site from zero and then start updating information, some get indexed quickly and some slowly, but basically within one month the inner pages will be indexed. So if it's a new site and nothing is indexed, don't panic — keep updating and it will definitely get indexed. The reason it isn't indexed is that although you've published articles, the search engine hasn't yet crawled your site's information.
The URL reason
Website directory levels that are too deep, or the use of dynamic URLs, will both affect how search engine spiders crawl your site, and thus affect indexing. So you must consider these factors before building a site.
The article itself
Case one: some friends say the articles they publish are all original yet not indexed, but when I later checked the articles they had published previously, I found that similar articles could be found in the search engine — this is actually a problem with the articles themselves.
Case two: the article is too short. Some articles are only a few dozen characters, and search engines have a very hard time indexing those.
The past update frequency problem
The site may have gone a long time without updates previously, and in that case the search engine spider will reduce the frequency with which it visits your site — for example, coming once a month just to see whether your site has any new content. So even if you later start updating original articles every day, the search engine won't discover them until perhaps a month later, which is why published articles stay unindexed.
The homepage isn't pulling in the latest articles
Many large sites have this problem: some treat the homepage as advertising space and only recommend a few premium or high-quality articles there. Since the search engine actually visits the homepage most frequently, if published articles can't be recommended to the homepage in time, then even though you've published them, the search engine very likely won't find them.
That's all for "What Causes a Website Not to Be Indexed by Search Engines." It's meant only for webmaster friends to exchange and learn from one another. SEO optimization is a process that requires persistence, and I hope we can all improve together.
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