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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” 该属性用于标示用户生成内容链接，例如在论坛、留言板、评论区等网页上由用户生成的链接。这些链接通常是用户分享的、自发的，并没有被主机站点以编辑或创作形式控制。对于这些链接，搜索引擎希望以更为宽松的标准来评估这些链接的权重。 3. rel=”nofollow” 该属性用于标示不希望被该页面关联的链接的权重传递给被链接的网页。通常情况下，该属性会用于标示低质量、垃圾、以及互相连接的网页，当然也可以用于标示商务合作的无意义链接。总之，nofollow标签是为了防止网站主在回复评论和发布广告等方面进行黑帽SEO操作，给搜索引擎带来不良反向链接的质量，增加了关注垃圾链接的难度。

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

如何进行内容与结构优化

内容与结构的优化，在站内优化中占很大的比例，一般包括首页、栏目页内页和各种聚合页面的优化，分为以下四个方面：1、中间商品展示栏为所有商品图片增加alt"图片注释，注释直接调用商品名称即可。2、商品分类页在大型广告栏上方增加频道标题与简短描述般60~80个中文字为宜。为所有商品图片增加alt="图片注释，注释直接调用商品名称即可，这样做的好处是当图片不能完全显示的时候还能保持文字

Public @ 2015-04-10 16:12:07

面包屑导航的原理与作用

面包屑导航是一种网站或应用程序的导航方式，它通过在页面上显示当前位置和历史路径，帮助用户快速理解网站结构和内容，并方便用户回到之前访问的页面。面包屑导航通常出现在页面的顶部或侧边，在用户浏览网站时一直存在。它的原理是在用户进入每个页面时，记录下之前访问的路径和页面层级关系，然后将这些信息用面包屑导航的形式展示给用户。面包屑导航的作用主要有以下几点： 1. 帮助用户了解网站结构：通过显示当前页

Public @ 2023-06-07 01:50:15

nofollow标签的作用有重大变化

几个小时前，Google官方博客发了个帖子：Evolving “nofollow” – new ways to identify the nature of links (演变中的nofollow – 判断链接性质的新方法)，公布从今天开始，nofollow标签的作用和Google处理nofollow的方法有了重大变化。nofollow标签的历史nofollow标签(准确说是属性，不过约定俗成，还

Public @ 2019-04-24 16:08:48

Nofollow的具体使用方法

nofollow标签通常有两种使用方法：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。<meta name="robots"content="nofollow" />2、将"nofollow"放在超链接中，告诉搜索引擎不要抓取特定的链接。<

Public @ 2019-11-03 16:08:53

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[ DB ] CONNECT:[ UseTime:0.022979s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.016268s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 7766 LIMIT 1 [ RunTime:0.015447s ]
[ 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:0.015793s ]
[ 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:0.016295s ]
[ 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:0.016402s ]
[ 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` = 7766 LIMIT 1 [ RunTime:0.015409s ]
[ 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+1 where id=7766 [ RunTime:0.016584s ]
[ 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:0.022543s ]
[ 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:0.038045s ]
[ 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:0.021983s ]
[ 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:0.031940s ]
[ 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', ) ]

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