What are the misunderstandings about domain names in building websites?
Doing SEO and website operation will inevitably deal with domain names! In the past few years, I have found a lot of new SEO novices, and even veterans have misunderstandings about domain names. Now summarize these misunderstandings and share them with everyone!
Misunderstanding 1: www domain name is a first-level domain name. This is a common misunderstanding that many SEO novices have! Unfortunately, the www domain name is a second-level domain name. As for how to distinguish the first-level domain name from the second-level domain name, we will share it below.
Myth 2: First-level domain name = Top-level domain
"First, you need to understand some principles of domain names. Domain names are hierarchical. From right to left, domain names go from high to low levels. For example, the .cn domain name in our country is the highest-level top-level domain name, and http: //abc.cn This domain name is a second-level domain name. If it is a domain name of the form www.xxxxx.cn, it is actually a third-level domain name. "
For the author of the article, this article is not commented, but from this article we can see: 1. The author is experienced and not a novice SEO; 2. The first-level domain name = top-level domain name in the author's perception
The following is Baidu Encyclopedia's definition of top-level domain names and first-level domain names:
Top-level domain name: A domain name consists of two or more words, separated by dots in the middle. The word on the far right is called the top-level domain name. The top-level domain name has a dot at the beginning. Such as: .com, .cn, .net, etc.
First-level domain name: The first-level domain name contains only one ".", And there must be a content field to the left of "."; Such as xxxx.cn
Domain Name Hierarchy: The number of domain names refers to how many levels a domain name consists of. Each level of a domain name is separated by a ".". In short, how many points are several levels of domain names. For example, www.xxxxx.cn is a second-level domain name.
Myth 3: How many points are the domain names of several levels? You are not mistaken. It is the Baidu Encyclopedia's definition of domain names mentioned above, but this definition itself is used to pit fathers! In fact, in many documents, consciously or unconsciously, the number of dots in the domain name is used as the basis for the classification of the domain name. But if you search on Baidu: inurl: com.cn, you will find that the world you know has collapsed. The top-level domain name that doesn't have a lot of control-.com.cn! (I feel a lot here because I have been pitted before!)
Misunderstanding 4: The weight of the first-level domain name is higher than that of the www domain name. The reason for this misunderstanding is a set of data! The number of first-level domain names> the number of www domain names! The result of the data analysis is that Baidu gives higher weight to the first-level domain name.
I have to say, this is a beautiful misunderstanding! Because in any case, the following relationship is absolutely true:
First-level domain name volume ≥www domain name volume
This is because the number of first-level domain names is equal to the sum of its own number plus the number of second-, third-, ...- level domain names. In other words, the volume of www domain names is considered to be part of the volume of first-level domain names. Therefore, the volume of www domain names cannot exceed that of first-level domain names.
For those websites whose link optimization is OK and do not open a second-level domain name other than www, the relational expression of domain name inclusion volume should be: first-level domain name inclusion volume = www domain name inclusion volume. The volume of first-level domain name> www domain name is the performance of insufficient link optimization, that is, the problem of duplicate pages Or above is included by Baidu, 301 is the best way to solve duplicate pages.)
By the way, most people choose the www domain name because this domain name is more easily accepted by the public and more in line with user habits. Of course, some people think that www domain names are easier to be included, but there is no clear evidence to prove this.
Misunderstanding 5: Controversial main domain name The main domain name definition is controversial because it does not have a clear definition to classify first-level domain names and second-level domain names. Regarding the definition of the main domain name, there are three points of view: 1. The main domain name is the first-level domain name; 2. The main domain name is the www domain name; 3. The main domain name is the middle part of the domain name, such as the main domain name of www.baidu.com Baidu (This kind of view is only seen in the term Baidu Encyclopedia main domain).
Let me offer my fourth point of view: the above points are correct, but they are also not correct! The function of domain names is to replace pure digital IPs for people to remember. The main domain name is the domain name that best represents the website, and it is the domain name that the webmaster most wants people to remember. So for most websites, the www domain is the primary domain.
Regarding the above five points, did you win?