Research on the influence of CDN on SEO

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Recalling the past

A year ago for a well-known novel site to do SEO optimization, the project's biggest difficulty is not in the keyword optimization and processing, but in order to explain a variety of SEO phenomenon. One problem that comes out of it bothers me so far. At that time found that there are many Web sites in Baidu included in the description, title is not the title of the Web page, in many times Baidu update is always a page this situation. When I shared this with several industry peers, I found that there were similar problems with their site. There is no clear answer after a long discussion. For this reason I asked this question in the relevant forum last June, and no one made a clear answer. Later, and peers in the study of this problem type of the same site, found a common point is that these sites are using CDN. In this regard, on the impact of CDN SEO on this issue has plagued me so far.

Here's a screenshot of the question at the time:

What is a CDN

1. Technical explanation

To understand the impact of CDN on SEO, we must first understand the working principle of CDN. CDN means content distribution network, which is a whole system which is deployed after strategy development, which consists of four elements: distributed storage, load balancing, redirection of network request and content management. Inside this content management and network traffic management is the core. Content management is the use of indexing, caching, streaming, multicast (multicast) and other technologies to publish or post content to the nearest user's remote service point (POP). In other words, the main station in Shanghai is sent to the server in Beijing and all over the country, and traffic management is to consider the geographical situation of visitors and the server itself traffic requests, select the appropriate server to complete the access request. At this point, one is to satisfy the visitor nearby, and the other is to make it easier for a certain geographical server to have too many visitors or not to open it. To find out more about CDN You can search for more information. The details of the CDN work can be found in the following figure:

2. Advantages

CDN has some advantages, the most obvious is the fast. I consulted the CDN service provider's website and summed up 5 points of advantage:

The effect of CDN on SEO

1, make the website visit speed quickly

This is obvious. After using a CDN, the site is open very fast. In Baidu and Google will open the speed of the Web page as one of the factors of SEO in the case of the Web page and keyword rankings are advantageous.

2, included in the problem

Of course this is a guess, I also think CDN for Baidu included there are some problems. Especially for snapshots. Here's a screenshot of this:

Reasons to explore:

1. Source-back mechanism

Because the CDN server periodically sends requests to synchronize updates to the contents of the files on the source server. If the source data server does not give power, or all the points in the country are selected in the full update request, this may cause Baidu spider in the visit did not see the page, timeout after the spider left, according to the provisions of the processing, presented to the customer page is what we saw before.

2, another two issues need to continue to study: IP too much impact on the station and redirect too much to the impact of the station.

This article is only a piece of research in the process of a brick, looking forward to participation and new results. Of course, some views may not be correct!

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