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nofollow標(biāo)簽的作用有重大變化

nofollow標(biāo)簽最初是由Google引入的，旨在告訴搜索引擎跟蹤鏈接的方式。它的作用是讓網(wǎng)站管理員控制搜索引擎是否跟蹤某個(gè)鏈接并傳遞權(quán)重。也就是說(shuō)，如果一個(gè)頁(yè)面包含了nofollow標(biāo)簽，搜索引擎就不會(huì)將該頁(yè)面與被鏈接的頁(yè)面相關(guān)聯(lián)，也不會(huì)將該頁(yè)面作為鏈接目標(biāo)的一部分考慮。這樣可以避免一些不必要的鏈接傳遞權(quán)重，同時(shí)可以防止人工操縱搜索引擎排名。然而，隨著時(shí)間的推移，nofollow標(biāo)簽的作用發(fā)生了重大變化。自2019年以來(lái)，Google已經(jīng)聲明nofollow鏈接可能會(huì)傳遞權(quán)重，但不保證傳遞權(quán)重。這意味著，如果某個(gè)頁(yè)面鏈接到其他頁(yè)面，即使該鏈接包含nofollow標(biāo)簽，搜索引擎仍然有可能將該頁(yè)面與被鏈接的頁(yè)面相關(guān)聯(lián)，仍然可能將該頁(yè)面作為鏈接目標(biāo)的一部分考慮。因此，nofollow標(biāo)簽已經(jīng)不再是控制搜索引擎是否跟蹤鏈接并傳遞權(quán)重的一種絕對(duì)方法。除此之外，nofollow標(biāo)簽還有一些其他的用途。例如，當(dāng)你將鏈接放置在評(píng)論中時(shí)，為了避免被認(rèn)為是垃圾郵件，在這些鏈接上使用nofollow標(biāo)簽可以避免搜索引擎將這些鏈接作為網(wǎng)站的重要因素考慮。此外，nofollow標(biāo)簽也可以用于避免搜索引擎跟蹤一些敏感信息或不可靠來(lái)源的鏈接，以保護(hù)用戶隱私和安全?？傊琻ofollow標(biāo)簽的作用在某種程度上已經(jīng)發(fā)生了變化，但它仍然是一種很重要的工具，可以幫助網(wǎng)站管理員控制搜索引擎發(fā)現(xiàn)和跟蹤鏈接的方式。

Public @ 2023-06-05 14:00:19

什么是移動(dòng)Sitemap協(xié)議,如何提交移動(dòng)Sitemap協(xié)議

百度推出了移動(dòng)Sitemap協(xié)議，用于將網(wǎng)址提交給移動(dòng)搜索收錄。百度移動(dòng)Sitemap協(xié)議是在標(biāo)準(zhǔn)Sitemap協(xié)議基礎(chǔ)上制定的，增加了<mobile:mobile/>標(biāo)簽，它有四種取值：<mobile:mobile/> ：移動(dòng)網(wǎng)頁(yè)<mobile:mobile type="mobile"/> ：移動(dòng)網(wǎng)頁(yè)<mobile:mobile ty

Public @ 2014-08-22 16:09:43

網(wǎng)站中死鏈接要怎么解決？

解決網(wǎng)站中死鏈接的方法可以包括以下幾種： 1. 找出死鏈接：通過(guò)使用在線鏈接檢查工具、網(wǎng)站分析工具或者掃描整個(gè)網(wǎng)站的程序，找出所有的死鏈接。這些工具能夠列出所有無(wú)法訪問(wèn)的鏈接。 2. 更新或修復(fù)鏈接：對(duì)于被標(biāo)記為死鏈接的頁(yè)面，在找到正確的URL后進(jìn)行更新，或者修復(fù)指向正確頁(yè)面的鏈接。如果無(wú)法找到新的頁(yè)面，則可以考慮刪除該鏈接。 3. 重定向鏈接：如果一個(gè)死鏈接指向的是刪除的頁(yè)面，可以通過(guò)設(shè)置

Public @ 2023-07-31 14:00:33

內(nèi)部鏈接nofollow控制權(quán)重分布

Nofollow屬性推出以后，Matt Cutts多次說(shuō)過(guò)，nofollow既可以用在論壇，博客等的留言中，代表這些鏈接不是站長(zhǎng)能控制和背書(shū)的，也可以用在某些內(nèi)部鏈接，以達(dá)到控制內(nèi)部鏈接權(quán)重和PR流動(dòng)及分布的目的。最常見(jiàn)的應(yīng)用是在網(wǎng)站聯(lián)系我們，隱私權(quán)政策，用戶條款等鏈接上。這些網(wǎng)頁(yè)往往都是整站有鏈接，如果沒(méi)有使用nofollow，整站的鏈接權(quán)重都會(huì)平等的流動(dòng)到這些網(wǎng)頁(yè)上。而像隱私權(quán)政策這些網(wǎng)頁(yè)一般

Public @ 2017-01-19 16:08:47

nofollow的定義及如何正確使用nofollow?

什么是nofollow：　　在html標(biāo)簽中，< a > 標(biāo)簽的rel 屬性被用于說(shuō)明當(dāng)前文檔與被鏈接文檔的關(guān)系。而nofollow則是其中的一種屬性值，其用法示例為：　　< a href="..." rel="nofollow" >...< /a >　　其另一種使用方法，也是最原始的使用方法，是用于網(wǎng)頁(yè)的元標(biāo)簽中，告訴搜

Public @ 2019-06-24 16:08:52

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基本文件流程錯(cuò)誤 SQL 調(diào)試

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[ DB ] CONNECT:[ UseTime:0.021570s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.015562s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8477 LIMIT 1 [ RunTime:0.014598s ]
[ 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:0.014725s ]
[ 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:0.014959s ]
[ 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:0.015186s ]
[ 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` = 8477 LIMIT 1 [ RunTime:0.015529s ]
[ 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=8477 [ RunTime:0.019527s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站結(jié)構(gòu)優(yōu)化' AND `status` <> -1 LIMIT 1 [ RunTime:0.022390s ]
[ 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` = '威海網(wǎng)站結(jié)構(gòu)優(yōu)化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.036839s ]
[ 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:0.021699s ]
[ 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:0.040746s ]
[ 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', ) ]

0.421153s

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nofollow標(biāo)簽的作用有重大變化

什么是移動(dòng)Sitemap協(xié)議,如何提交移動(dòng)Sitemap協(xié)議

網(wǎng)站中死鏈接要怎么解決？

內(nèi)部鏈接nofollow控制權(quán)重分布

nofollow的定義及如何正確使用nofollow?

更多您感興趣的搜索

Categories

Tags

nofollow標(biāo)簽的作用有重大變化

什么是移動(dòng)Sitemap協(xié)議,如何提交移動(dòng)Sitemap協(xié)議

網(wǎng)站中死鏈接要怎么解決？

內(nèi)部鏈接nofollow控制權(quán)重分布

nofollow的定義及如何正確使用nofollow?

更多您感興趣的搜索

網(wǎng)站中死鏈接要怎么解決？