使用nofollw的意义，nofollw标签的两种具体用法_威海佰年网络技术有限公司_网站建设_软件开发_私有云_商标注册_公众号_小程序_APP_物联网_ChatGPT

Categories

Tags

使用nofollw的意义，nofollw标签的两种具体用法

使用nofollw的意义

nofollow 是一个HTML标签的属性值。它的出现为网站管理员提供了一种方式，即告诉搜索引擎"不要追踪此网页上的链接"或"不要追踪此特定链接。这个标签的意义是告诉搜索引擎这个链接不是经过作者自己编辑的，所以这个链接不是一个信任票。

简单的说就是，如果A网页上有一个链接指向B网页，但A网页给这个链接加上了 rel="nofollow" 标注，则搜索引擎不把A网页计算入B网页的反向链接，搜索引擎看到这个标签就可能减少或完全取消链接的投票权重。

nofollw标签的两种具体用法

1、将"nofollow"写在网页上的meta标签上，用来告诉搜索引擎不要抓取网页上的所有外部和包括内部链接。

2、将"nofollow"放在超链接中，告诉搜索引擎不要抓取特定的链接。

来源：A5营销

Public @ 2021-01-20 16:08:49

Robots.txt 文件应放在哪里？

Robots.txt文件应放在网站的根目录下。

Public @ 2023-06-23 19:50:03

能否利用canonical标签陷害竞争对手？

不能。Canonical标签的作用是帮助搜索引擎正确识别源代码当中只有部分网页上相同内容的页面，它不能用于欺诈或破坏搜索引擎算法。Canonical标签可以帮助提高搜索排名，但它不能损害竞争对手或陷害竞争对手。

Public @ 2023-02-25 19:24:11

nofollow标签的作用有重大变化

nofollow标签的作用主要是告诉搜索引擎不要跟进某个链接。最初，它的主要目的是阻止链接操纵，这是一种非法的搜索引擎优化技术，通过在许多网站中添加低质量或垃圾链接来提高目标网站的排名。但是，随着时间的推移，nofollow标签已经被广泛应用于其他目的，例如： 1. 防止广告链接滥用：使用nofollow标签告诉搜索引擎某个链接是广告链接，这有助于避免被视为违反搜索引擎的广告政策。 2. 控制

Public @ 2023-06-20 15:50:19

nofollow标签的作用有重大变化

2019年9月10日，Google官方博客表示，nofollow属性将不再仅代表拒绝传递权重，而将拓展为三种属性：rel="sponsored"、rel="ugc"、rel="nofollow"。 1. rel=”sponsored” 该属性用于标示被广告赞助的链接，例如广告合作，展示商标，赞助商链接等。它是告诉搜索引擎，链接是被广告商赞助，而非独立推荐。 2. rel=”ugc” 该属性

Public @ 2023-04-26 02:50:15

更多您感兴趣的搜索

基本文件流程错误 SQL 调试

/www/wwwroot/bninc.cn/public/index.php ( 0.79 KB )
/www/wwwroot/bninc.cn/public/public.php ( 1.08 KB )
/www/wwwroot/bninc.cn/thinkphp/start.php ( 0.73 KB )
/www/wwwroot/bninc.cn/thinkphp/base.php ( 2.66 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Loader.php ( 19.47 KB )
/www/wwwroot/bninc.cn/vendor/composer/autoload_namespaces.php ( 0.21 KB )
/www/wwwroot/bninc.cn/vendor/composer/autoload_psr4.php ( 0.84 KB )
/www/wwwroot/bninc.cn/vendor/composer/autoload_classmap.php ( 0.14 KB )
/www/wwwroot/bninc.cn/vendor/composer/autoload_files.php ( 0.42 KB )
/www/wwwroot/bninc.cn/vendor/qiniu/php-sdk/src/Qiniu/functions.php ( 7.10 KB )
/www/wwwroot/bninc.cn/vendor/qiniu/php-sdk/src/Qiniu/Config.php ( 0.70 KB )
/www/wwwroot/bninc.cn/vendor/topthink/think-captcha/src/helper.php ( 1.59 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Route.php ( 59.82 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Config.php ( 6.03 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Validate.php ( 40.27 KB )
/www/wwwroot/bninc.cn/vendor/topthink/think-queue/src/config.php ( 0.77 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Console.php ( 21.22 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Error.php ( 3.59 KB )
/www/wwwroot/bninc.cn/thinkphp/convention.php ( 10.31 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/App.php ( 21.04 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Request.php ( 50.94 KB )
/www/wwwroot/bninc.cn/app/config.php ( 11.25 KB )
/www/wwwroot/bninc.cn/app/database.php ( 1.41 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Hook.php ( 4.76 KB )
/www/wwwroot/bninc.cn/app/tags.php ( 1.16 KB )
/www/wwwroot/bninc.cn/app/common/behavior/InitBase.php ( 8.17 KB )
/www/wwwroot/bninc.cn/app/common.php ( 23.29 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Env.php ( 1.25 KB )
/www/wwwroot/bninc.cn/thinkphp/helper.php ( 17.86 KB )
/www/wwwroot/bninc.cn/app/function.php ( 0.78 KB )
/www/wwwroot/bninc.cn/app/extend.php ( 13.29 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Debug.php ( 7.06 KB )
/www/wwwroot/bninc.cn/app/common/model/Config.php ( 0.78 KB )
/www/wwwroot/bninc.cn/app/common/model/ModelBase.php ( 12.18 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Model.php ( 66.83 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Db.php ( 6.54 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Log.php ( 5.84 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/db/connector/Mysql.php ( 3.94 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/db/Connection.php ( 29.97 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/db/Query.php ( 86.80 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/db/builder/Mysql.php ( 2.16 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/db/Builder.php ( 30.47 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Cache.php ( 6.17 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/cache/driver/File.php ( 7.46 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/cache/Driver.php ( 5.52 KB )
/www/wwwroot/bninc.cn/app/common/behavior/InitHook.php ( 1.25 KB )
/www/wwwroot/bninc.cn/app/common/model/Hook.php ( 0.77 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Lang.php ( 6.95 KB )
/www/wwwroot/bninc.cn/thinkphp/lang/zh-cn.php ( 3.85 KB )
/www/wwwroot/bninc.cn/app/route.php ( 0.91 KB )
/www/wwwroot/bninc.cn/app/index/config.php ( 0.96 KB )
/www/wwwroot/bninc.cn/app/index/common.php ( 0.68 KB )
/www/wwwroot/bninc.cn/app/index/controller/Wiki.php ( 2.44 KB )
/www/wwwroot/bninc.cn/app/index/controller/IndexBase.php ( 1.10 KB )
/www/wwwroot/bninc.cn/app/common/controller/ControllerBase.php ( 4.75 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Controller.php ( 6.20 KB )
/www/wwwroot/bninc.cn/thinkphp/library/traits/controller/Jump.php ( 4.97 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/View.php ( 6.86 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/view/driver/Think.php ( 5.61 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Template.php ( 46.46 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/template/driver/File.php ( 2.24 KB )
/www/wwwroot/bninc.cn/app/index/logic/Wiki.php ( 6.16 KB )
/www/wwwroot/bninc.cn/app/index/logic/IndexBase.php ( 0.79 KB )
/www/wwwroot/bninc.cn/app/common/logic/LogicBase.php ( 0.83 KB )
/www/wwwroot/bninc.cn/app/common/model/Article.php ( 0.78 KB )
/www/wwwroot/bninc.cn/app/common/model/ArticleTongji.php ( 0.79 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/paginator/driver/Bootstrap.php ( 5.90 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Paginator.php ( 9.45 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Collection.php ( 8.63 KB )
/www/wwwroot/bninc.cn/runtime/temp/fd12b1d7af823e9ae53201dacc6a6621.php ( 56.49 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/Response.php ( 8.64 KB )
/www/wwwroot/bninc.cn/thinkphp/library/think/debug/Html.php ( 4.27 KB )

[ DB ] CONNECT:[ UseTime:0.025235s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_config` [ RunTime:0.018399s ]
[ SQL ] SELECT * FROM `ob_config` [ RunTime:0.017214s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_config', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 25, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_hook` [ RunTime:0.017820s ]
[ SQL ] SELECT `id`,`name`,`addon_list` FROM `ob_hook` [ RunTime:0.017003s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_hook', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 3, 'extra' => NULL, ) ]
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.017951s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4363 LIMIT 1 [ RunTime:0.017025s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.017208s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, '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:0.017648s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, '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:0.017911s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4363 LIMIT 1 [ RunTime:0.017065s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+2 where id=4363 [ RunTime:0.017659s ]
[ 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:0.024151s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, '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:0.038261s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海nofollow' AND `status` <> -1 LIMIT 1 [ RunTime:0.025231s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海nofollow' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.032486s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 8035, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.584875s

ShowPageTrace