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Nofollow

nofollow 是HTML頁面中a標簽的屬性值。這個標簽的意義是告訴搜索引擎"不要追蹤此網(wǎng)頁上的鏈接或不要追蹤此特定鏈接"。

nofollow是HTML頁面中a標簽的屬性值。它的出現(xiàn)為網(wǎng)站管理員提供了一種方式，即告訴搜索引擎"不要追蹤此網(wǎng)頁上的鏈接"或"不要追蹤此特定鏈接"。這個標簽的意義是告訴搜索引擎這個鏈接不是經(jīng)過作者信任的，所以這個鏈接不是一個信任票。

nofollow標簽是由谷歌領頭創(chuàng)新的一個“反垃圾鏈接”的標簽，并被百度、yahoo等各大搜索引擎廣泛支持，引用nofollow標簽的目的是：用于指示搜索引擎不要追蹤（即抓?。┚W(wǎng)頁上的帶有nofollow屬性的任何出站鏈接，以減少垃圾鏈接的分散網(wǎng)站權重！

簡單的說就是，如果A網(wǎng)頁上有一個鏈接指向B網(wǎng)頁，但A網(wǎng)頁給這個鏈接加上了 rel="nofollow" 標注，則搜索引擎不把A網(wǎng)頁計算入B網(wǎng)頁的反向鏈接。搜索引擎看到這個標簽就可能減少或完全取消鏈接的投票權重。

nofollow是HTML的一個屬性，用于告訴搜索引擎不要追蹤特定的網(wǎng)頁鏈接?？梢杂糜谧柚乖赑R值高的網(wǎng)站上以留言等方式添加鏈接從而提高自身網(wǎng)站排名的行為，以改善搜索結(jié)果的質(zhì)量，防止垃圾鏈接的蔓延。網(wǎng)站站長也可對其網(wǎng)頁中的付費鏈接使用nofollow來防止該鏈接降低搜索排名。對一些重要度低的網(wǎng)頁內(nèi)容使用nofollow，還可以使搜索引擎以不同的優(yōu)先級別來抓取網(wǎng)頁內(nèi)容。

Public @ 2009-03-10 16:08:53

網(wǎng)站如何做好 301/302 跳轉(zhuǎn)

1. 理解 HTTP 狀態(tài)碼 301/302： HTTP 狀態(tài)碼是用來告知瀏覽器服務器返回的狀態(tài)信息，它是用來表示網(wǎng)絡交互中出現(xiàn)的狀態(tài)。301 是永久性跳轉(zhuǎn)，指示瀏覽器所請求的頁面已永久性移到新位置。302 是臨時跳轉(zhuǎn)，表示瀏覽器訪問新的頁面時會被重定向到另一個暫時的網(wǎng)址，會在指定的時間后返回原來的網(wǎng)址。 2. 定義 301/302 跳轉(zhuǎn)：要定義 301/302 跳轉(zhuǎn)，首先要明確目的，

Public @ 2023-02-25 07:12:42

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[ DB ] CONNECT:[ UseTime:0.023331s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.018348s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 4372 LIMIT 1 [ RunTime:0.015713s ]
[ 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:0.016199s ]
[ 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:0.016194s ]
[ 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:0.016575s ]
[ 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` = 4372 LIMIT 1 [ RunTime:0.015695s ]
[ 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=4372 [ RunTime:0.016882s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站結(jié)構優(yōu)化' AND `status` <> -1 LIMIT 1 [ RunTime:0.024684s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海網(wǎng)站結(jié)構優(yōu)化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.109256s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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:0.024172s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, '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:0.107480s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

0.588967s

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Nofollow

網(wǎng)站如何做好 301/302 跳轉(zhuǎn)

再談Canonical標簽

nofollow的定義及如何正確使用nofollow?

Nofollow的具體使用方法

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