Seo optimization should pay attention to that aspect
I. Portal webpage
Many web pages are independently designed to obtain high search rankings, but they have little value for site visitors. This is the portal page, and the search login page is not a portal page.
2. Overlapping keywords
It is the well-known keyword loading. This technology is truly an abuse of reasonable content optimization practices. It is good to use keywords on the search login page, and you often do this. However, when you start to attract search engines to add them, your web page will be marked. Keywords irrelevant to the front and back texts are accumulated in the graphic or text that appears in turn, or are a variant of this immoral technique in the <noscript> or <noframes> label.
3. Hide text
HTML provides many opportunities to place text in front of spider programs so that visitors cannot see it. Displaying text in an incredible small size, or using a font color that is the same as the background color, is an old scam. New technologies include using style sheets to write keywords on webpages and then overwriting them by images or other page components. In short, you can't find the web page from the browser at any time, but you can see it through the HTML source code. This is cheating. Only valid HTML comments are excluded. They are ignored by browsers and spider programs at the same time.
IV. Duplicate tags
Repeated title tags or other meta tags can be used to promote rankings. The same style sheet method can hide text or overwrite text on it, so that only one display is displayed on the screen and multiple times are listed on the HTML file.
5. Repeated sites
If you can clone a site, why do you need to stop it on the copy tag? You can copy sites under different domain names using a little different content and link each of these sites to each other (to increase the page ranking factors ). Maybe your site may have more than half of the top 10 rankings.
The above actions are dangerous to your website, but the bad news is that all these technologies sometimes work. However, most of the time, cheating technology is like a stock trick. When you hear it, it may be too late, the stock price has risen, and the search engine has a countermeasure.