First of all, we should know whether the old domain name is helpful to the SEO ranking of the website. This does exist, because the old domain name has the following unique advantages over the new domain name for website SEO: 1. It has withstood some surveys of search engines: Have you ever heard of the sandbox effect and the new site effect? Generally speaking, no matter how good your content is and how powerful your external links are, a new website will not rank in a short time. Even if it has a ranking, it will immediately click your website, because the search engine will think your website is normal, but the old domain name doesn't need this at all. The search engine has extracted the old domain name from one of its database boxes, so even if a large number of external links are added in a short time, the old domain name will not be k-dropped or anything. Therefore, the domain name has a long history, and the corresponding search engine weight will be higher. 2. Advantages of external links: The newly registered domain name may not have external links, but the old domain name does, because there are always many webmasters who abandon their sites and domain names. Before abandoning them, they must be building external links for these sites, which will inevitably bring many links to this domain name. Although the number of external chains may not be as good as before when we registered, there are still some, and with the precipitation, these external chains are very good. Secondly, let's take a look at the effect that the old domain name can achieve as a website: 1, and quickly include: 10. I made a website with an old domain name a few days ago, and posted a snapshot on the same day. I didn't do anything. I believe that external links and related mechanisms of search engines play a role here. 2. Good ranking: there is no direct relationship between inclusion and ranking, so let's talk about ranking here. The old domain name can indeed rank higher than the new domain name. I believe that many people who are engaged in website optimization SEO have taken over the list of optimization. I also believe that most people prefer to optimize their websites directly instead of re-registering a new domain name. If they know the code and some search engine-related algorithms, they only need to change the structure code or something, and the ranking of a new domain name will stand out in a short time. 3. There may be a pr problem: pr and domain name age. Many websites can reach level 6 after re-registration. Many websites haven't been updated for several years, or they disappear after being updated once. In fact, what I'm talking about here may be that the old domain name you found already has pr. What I wrote before is whether the webmaster is still paying attention to pr. In fact, to be honest, pr also plays a very important role in exchanging friendship links, which is very important for fancy. Finally: I want to say that not all old domain names are good, and everything has advantages and disadvantages. If a site that was a garbage station before its death and was visited by K has a flawed website domain name in the search engine, do you think it will bring unexpected effects to website SEO? I believe that there is such a database in the search engine, which puts some annoying websites in it and reviews them for a long time, maybe half a year, maybe a year or two. So when scouring these old domain names, you can use some tools to check the history, external links, rankings and so on. There are always swift horses, and this Bole depends on whether you are right or not.