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搜索引擎如何判斷網(wǎng)頁核心關(guān)鍵詞？

選擇恰當(dāng)?shù)年P(guān)鍵詞是SEO考驗技巧的環(huán)節(jié)之一，只有選擇正確的關(guān)鍵詞，才能使SEO走在正確的方向上。網(wǎng)頁核心關(guān)鍵詞和網(wǎng)站頁面的相關(guān)性程度，相關(guān)性好自然會有好的排名。搜索引擎判斷網(wǎng)頁核心關(guān)鍵詞會通過標(biāo)簽、關(guān)鍵詞密度、站內(nèi)和站外的錨文本來判定一個頁面的核心關(guān)鍵詞。搜索引擎判斷網(wǎng)頁核心關(guān)鍵詞：1、關(guān)鍵詞密度搜索詞在頁面出現(xiàn)的次數(shù)越多，密度越高，說明頁面與搜索詞相關(guān)；一般來說，出現(xiàn)2-3次關(guān)鍵詞就可以，文章次

Public @ 2009-04-15 15:16:55

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[ DB ] CONNECT:[ UseTime:0.029194s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.020706s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海核心關(guān)鍵詞' AND `status` <> -1 LIMIT 1 [ RunTime:0.026559s ]
[ 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` = '威海核心關(guān)鍵詞' AND `status` <> -1 ORDER BY create_time desc LIMIT 0,10 [ RunTime:0.027383s ]
[ 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 filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.019953s ]
[ 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:0.020056s ]
[ 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:0.020328s ]
[ 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', ) ]

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搜索引擎如何判斷網(wǎng)頁核心關(guān)鍵詞？

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