It should be explained first that these are my personal experiences. If you are not interested, you are welcome to correct them and share them with us based on some details.
Fish raises a website where keywords can be accumulated and asks about the effect and consequences. From this question, I will first say that many search engines will automatically identify the behavior of deliberately accumulating keywords, such as "free community forum website passion QQ hot girl", these are high-frequency keywords, in addition, the relationship between the first few and the last few is very small. I guess there may be a tolerance. If the high-frequency keywords accumulate over a limit, it may be squashed by baidu and Google will lose the right.
Of course, search engines, even robots such as Google, should also be manually reviewed. This does not rule out the possibility of manual batch review of high-frequency keyword titles.
Because most of the detailed operations on search engines are unknown, we can only understand them based on our own experience and feelings. My personal experience from now on is to reasonably arrange a proper number of keywords on the basis of steadfast website and publicity, generally 2-3. At present, I am doing this. baidu and google are very nice to me.
I have another idea about Title recognition, that is, I suspect that robots have byte restrictions when searching titles. An estimate like the heap to metamorphosis won't see the back. If Google and baidu haven't thought of this yet, try it because the Title of a normal website is not very long and the Title of over 30 Chinese characters is hard to solve.
Google robots also have a metamorphosis. They like to analyze domain names. If a domain name contains certain keywords, it is easier to include them. However, one stupid thing is that if the keyword is at the back of the domain name, the ranking will be much worse. For example, if fayecn.com and cnfaye.com search for Faye and the same website content, the former is definitely ahead. It seems that baidu does not.
Google baidu has its own characteristics and technical expertise. For example, for academic purposes, I think Google has found a lot more accurate, and baidu is a little less accurate, but the keyword part, I personally think that Baidu is doing better and fair. In Chinese search, I still like baidu, making it easier to find what I want.
As for garbage like 3721, you don't need to worry about it. When it doesn't exist. However, this is a mix of personal emotions, so you don't have to be so angry with me when you actually do the station. A little more traffic is required.
When defining the Title of an article, webmasters should follow the content on this page and follow the principle of streamlining as much as possible. This is easy to read, formal, and convenient for users to collect a page. I believe that the first response to a website with an extraordinary title is cheating or non-standard, so it is certainly not a good impression.