Spiders don't like your station, do you know why?

Many webmasters in order to analyze the spider crawling site, of course, most of the webmaster is simply to understand the day spider crawling times, this is enough to find the problem. Sometimes, we will feel that their site has been quite perfect, and the normal optimization process, the spider is not cold, let a person is very anxious. Search engine with spiders in the Internet to search for "prey", the only clue that it can be linked to, find new links, according to the complex algorithm finally ranked the site, stored in the database. Many websites may lose the chance to visit the spiders because of the confusion of the website structure. However, spiders do not visit the site a lot of factors, Ufa Yang Yan tea optimization analysis as follows:

1, the site dead chain took more than

We can imagine that the spider cheerfully came to your site, start a link search , thought found a pile of good content, but is a bunch of open links waiting for her, once, twice, three times, every time this is the case, so she was angry, will never visit your page. Most of the sites are dead links, as long as we can be found in a timely manner and cleared away the problem, you can use the powerful Xenu, you can also view your Web site log, found that return 404 status code to clear.

2 pictures, Flash, and so on too much

have to say, the search engine developed to now, has been compared to the intelligent, last year, Google launched the image search function, can analyze the color of the picture, pixel ratio and find the source of the picture. However, the technology for search engines to fully identify the information in the picture there is no small gap, and a lot of webmaster or do not know search engine optimization, or consider the site beautiful and rich content, often in the page embedded a large number of high-definition pictures, flash, even if your site content is good, spiders can not know, can only bypass the line. Now on the network has many simulation spiders to crawl the tool, has the similar situation http://www.aliyun.com/zixun/aggregation/32466.html "> webmaster may inquire about own website the information, Look at the information spiders can find and how far the human eye sees the gap.

3 outside the chain and nofollow

The reason spiders can successfully find and access your site, because there are links to other sites on your site. Want to more frequent spiders, in the establishment of the chain should be considered outside the chain site weights, the number of recorded, the higher the value of the PR, snapshot update faster site weight is higher. In addition, some unscrupulous webmaster in the friendship link, will deliberately set nofollow, such a chain in the spider's Eyes in the form of a fictitious, if your site outside the chain of this phenomenon, please promptly removed.

4 Web site code complex

website construction, code optimization is very important, lengthy code has no meaning to the Web site, but also affects the speed of opening and search engine spiders judgment.

5 sitemap Error

Site Map is a good tool for search engine comprehensive understanding of the site, for spiders, the site map is like a roster, good site map can make spiders have a point of access to any page in the site. So, we need to be cautious when making sitemap. There are also many tools on the Web to make site maps, and to ensure that they are foolproof, you can also visit them as visitors to verify them.

6 Web site logical Structure

The correct logical structure of the site should be flat-shaped tree structure, that is to say, the spider through the home page access, can reach any one of the column pages, through the column page can reach any content page, this number should be limited to 3 times ( Larger sites can be more than a few layers. If the site is too many levels, the weight of the site is not high enough, spiders are not interested in a layer of search.
from Ufa tea (http://www.yangyancha.cn) released