What is the difference between a second-level domain name and a second-level directory in Seo?

Just like insulator and non-insulator, It is not absolute. In some sites, the second-level domain name is higher than the second-level directory, and in some sites, the second-level directory is higher than the second-level domain name. The following is a simple analysis of the second-level domain name and second-level directory. Analysis weight: many of my friends know that a second-level domain name is actually a small station that is divided from the main station. A small station will take the weight of the main station. If there are too many second-level domain names, and there is not enough manpower and time to take care of them, it is easy to cause a weight imbalance. Unbalanced size: if a large number of second-level domain names are used as column pages, the content of the main site may be insufficient, the quantity and quality may be faulty, the main site has no content, and the weight will be relatively low. When a search engine crawls to a second-level domain name, it treats it as a small site. In other words, a large station is divided into several small stations. The power is not concentrated, leading to unbalanced weights of the main station and substation. advantages of second-level domain names: 1. A second-level domain name is a domain name-level path, which has a higher weight than a directory level and is easy to rank. 2. the second-level domain name is conducive to later maintenance and upgrade. If the traffic of a classified page is high, it can be transferred to a separate server, while the directory cannot be implemented. 3. A large number of second-level domain names form a group of sub-domain names, and the travel sub-stations are surrounded by the main station mode, which is very helpful for the ranking of the main domain names. 4. Easy access to high-quality external links. Disadvantages of second-level domain names: 1. the workload increases and the content increases. it is inconvenient to update the content. 2. this vulnerability may cause unbalanced content on the main site. advantages of classification Directory: 1. all the content of the website is under the main site. The quantity and quality of the content directly affect the ranking of the website. 2. easy to update content, just one background. 3. links are concentrated under one domain name, which is conducive to the growth of prvalue. disadvantages of category Directory: 1. classification directories are difficult to obtain good rankings. 2. classification directories are hard to get good links. considerations for second-level domain name selection: 1. b2B, portal sites, information sites, and news sites: (suitable) these sites have a large amount of information, with a large number of information sources and a wide range of information. 2. SME site: (not suitable) the content is small. Using classification directories can help you get a higher ranking. comparison of advantages of other paths: