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canonical标签是什么意思

a：网页的<Canonical>是告诉搜索引擎在若干的内容相同，URL不同的页面中那个最规范，最希望被收录的，避免相同内链的网页通过不同URL带来权重分散的问题，从而达到页面权重集中的目的。

Public @ 2011-07-22 16:11:20

博客网站导航的制作

今天看完一本不错的书《锦绣蓝图：怎样规划令人流连忘返的网站》，此书主要针对的是网站规划，是很值得信息架构师学习的一本书，前端设计和开发人员也值得一读。书中讲了一些原先令很多人忽视的网站设计要素，例如“信息架构”一章，阐述了“标签”（元数据）是组织信息的基础，让我对Tags的作用有了新的认识，而在“导航之道”一章，阐述了一个简单的道理：好的页面导航能让用户找到自己想要的东西。关于导航的设计，让我想到

Public @ 2014-02-19 16:11:43

robots非标准扩展协议

Crawl-delay 指令:几大抓取工具支持Crawl-delay参数，设置为多少秒，以等待同服务器之间连续请求，如:User-agent:*Crawl-delay:10来源：360站长平台

Public @ 2017-09-15 16:09:04

canonical标签是什么？canonical标签有什么作用？

canonical标签的作用和301跳转对于搜索引擎的作用非常相似，这个标签对搜索引擎作用非常大，那么网站什么情况下我们需要使用到canonical标签。canonical标签是什么？canonical标签跟301转向的性质差不多，区别在于用户不会被转向，还是停留在原本的页面上，但搜索引擎会把它当做301转向处理，把页面的权重集中到标签中所指的规范网页上。canonical标签的使用技巧1、can

Public @ 2021-01-24 16:11:19

canonical标签是什么意思

a：网页的<Canonical>是告诉搜索引擎在若干的内容相同，URL不同的页面中那个最规范，最希望被收录的，避免相同内链的网页通过不同URL带来权重分散的问题，从而达到页面权重集中的目的。

Public @ 2011-07-22 16:11:20

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[ DB ] CONNECT:[ UseTime:0.000347s ] mysql:dbname=briline;host=127.0.0.1;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.000593s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4552 LIMIT 1 [ RunTime:0.000332s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.000482s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.000567s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.000808s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4552 LIMIT 1 [ RunTime:0.000399s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=4552 [ RunTime:0.004372s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.010245s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.022618s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海canonical' AND `status` <> -1 LIMIT 1 [ RunTime:0.005295s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海canonical' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.015657s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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