First of all, it is better not to use the second-level domain name of a large website for the new website, and buy a domain name that belongs to you.
Secondly, the domain name selection should not be too long, and the long one will not affect the collection, mainly because it is inconvenient to remember. And search engines favor short domain names
The third point is that it is best to include keywords in the domain name. The inclusion of keywords is good for search engines. Chinese websites choose Pinyin or digital homophony, and English websites can choose corresponding words;
Finally, choose the suffix such as .com/.net/.cn, etc.; choose according to your needs, it is recommended to choose the mainstream domain name suffix.