What are the advantages and disadvantages of second-level domain names? How to analyze second-level domain names?

We all know that domain names are divided into top-level domain names, first-level domain names, and second-level domain names. So how are these domain name types distinguished?

For example, a domain name like XXX.com is called an international top-level domain name, and a domain name like XX.com.cn is actually a second-level domain name. In addition, adding www in front of the domain name is also called a second-level domain name. As long as other letters are added in front of the top-level domain name to distinguish it, it is called a second-level domain name. Adding www in front of the domain name is a protocol on the Internet and a common way of website domain names.

Below, the editor will analyze the relevant knowledge of domain name second-level domain names for everyone.

Using a second-level domain name has both advantages and disadvantages. The advantages and disadvantages of using a second-level domain name are:

Advantages:

1. Using a second-level domain name to optimize related keywords has certain advantages for the website, which can help the website get more views and help the website spread and remember among users.

2. The form of the first-level directory will inherit the weight of the homepage to some extent, so there will be no sandbox mechanism.

Disadvantages:

1. Using a second-level domain name means that the search engine sees it as a new independent website. At this time, the website's weight and PR value need to be cultivated from scratch, which not only requires the webmaster to have enough patience, but also may face the risk of the sandbox mechanism, which is a test for the webmaster's ability.

2. When facing difficult keywords, the advantage of the second-level domain name is not very obvious.