What is canonical tag ?

joelmasan Level 1

December 29, 2012, 1:46 am

Write the reason you're deleting this FAQ

What is canonical tag ?

Hi Every one. After Long time I am back...
what is Canonical tag ?

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johnmith

Hi Every one. After Long time I am back...
what is Canonical tag ?

Many content management systems are configured with errors which cause duplicate or exceptionally similar content to get indexed under multiple URLs. Many webmasters use inconsistent link structures throughout their site that cause the exact same content to get indexed under multiple URLs. The canonical version of any URL is the single most authoritative version indexed by major search engines. Search engines typically use PageRank or a similar measure to determine which version of a URL is the canonical URL.

13 years ago

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vinay

A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred", version of a web page as part of search engine optimization.

13 years ago

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Load	Count	SQL	Max	Min
0.924455	3	SELECT A.*, B.seo, B.name as categoryname, C.username, C.userlevel, C.lastlogin, C.ip, C.profilepicture FROM wanttobuy A, categories_wanttobuy B, seoclerks.members C WHERE A.active = 1 AND A.category = B.CATID AND A.USERID = C.USERID ORDER BY A.viewcount desc LIMIT 0,40	0.326604	0.289911
0.581174	3	SELECT COUNT(A.wantid) AS total FROM wanttobuy as A, categories_wanttobuy B, seoclerks.members C WHERE A.active = 1 AND A.category = B.CATID AND A.USERID = C.USERID	0.202048	0.186936

Avg Time	Count	SQL	Max	Min
0.308152	3	SELECT A.*, B.seo, B.name as categoryname, C.username, C.userlevel, C.lastlogin, C.ip, C.profilepicture FROM wanttobuy A, categories_wanttobuy B, seoclerks.members C WHERE A.active = 1 AND A.category = B.CATID AND A.USERID = C.USERID ORDER BY A.viewcount desc LIMIT 0,40	0.326604	0.289911
0.193725	3	SELECT COUNT(A.wantid) AS total FROM wanttobuy as A, categories_wanttobuy B, seoclerks.members C WHERE A.active = 1 AND A.category = B.CATID AND A.USERID = C.USERID	0.202048	0.186936

SEOClerks

What is canonical tag ?

What is canonical tag ?

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johnmith

vinay

Invalid SQL

Expensive SQL

Suspicious SQL

Match	Count	SQL	Script
SELECT * FROM `questions` as q JOIN categories_faq as c ON q.catid=c.CATID WHERE (q.status=1 OR (q.status=2 AND userid='') ) AND q.quesid='15112'	1	SELECT q.*, c.seo as CatSEO, c.name as CatName, c.parentid FROM `questions` as q JOIN categories_faq as c ON q.catid=c.CATID WHERE (q.status=1 OR (q.status=2 AND userid='') ) AND q.quesid='15112'	/opt/clerks-staging/docroot/viewfaq.php 496 () ()
SELECT * FROM seoclerks.members WHERE USERID='20071'	1	SELECT * FROM seoclerks.members WHERE USERID='20071'	/opt/clerks-staging/docroot/include/functions/includes/member.php 445 GetAllUserDetails() ()
SELECT * FROM seoclerks.members WHERE USERID=20071	1	SELECT googleplus_profile FROM seoclerks.members WHERE USERID=20071	/opt/clerks-staging/docroot/include/functions/main.php 16914 GetGooglePlusProfileFromId() ()
SELECT * FROM ratings_faq as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=15112 LIMIT 5	1	SELECT m.username FROM ratings_faq as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=15112 LIMIT 5	/opt/clerks-staging/docroot/include/functions/main.php 17159 GetVoters() ()
SELECT * FROM answers a, seoclerks.members b WHERE a.quesid='15112' AND a.userid=b.USERID and b.status='1' AND a.status=1 ORDER BY a.combined_votes DESC, a.date_answered asc	1	SELECT a.answer, a.USERID, a.upvotes, a.downvotes, a.ansid, a.parentid, a.combined_votes, a.date_answered, b.username, b.userlevel, b.profilepicture FROM answers a, seoclerks.members b WHERE a.quesid='15112' AND a.userid=b.USERID and b.status='1' AND a.status=1 ORDER BY a.combined_votes DESC, a.date_answered asc	/opt/clerks-staging/docroot/viewfaq.php 1245 () ()
SELECT * FROM ratings_faqanswers as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=80103 LIMIT 5	1	SELECT m.username FROM ratings_faqanswers as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=80103 LIMIT 5	/opt/clerks-staging/docroot/include/functions/main.php 17159 GetVoters() ()
SELECT * FROM ratings_faqanswers as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=80104 LIMIT 5	1	SELECT m.username FROM ratings_faqanswers as r, seoclerks.members as m WHERE r.USERID=m.USERID AND r.upvote=1 AND r.PID=80104 LIMIT 5	/opt/clerks-staging/docroot/include/functions/main.php 17159 GetVoters() ()
UPDATE questions SET total_views = total_views + 1 WHERE quesid='15112'	1	UPDATE questions SET total_views = total_views + 1 WHERE quesid='15112'	/opt/clerks-staging/docroot/include/functions/main.php 1765 update_Faqviewcount() ()
SELECT * FROM questions WHERE quesid!='15112' AND status='1' AND (question like '% canonical tag ?%' OR question like '%canonical%') -- ORDER BY RAND() LIMIT 15	1	SELECT quesid, question, seo, userid FROM questions WHERE quesid!='15112' AND status='1' AND (question like '% canonical tag ?%' OR question like '%canonical%') -- ORDER BY RAND() LIMIT 15	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() ()
SELECT * FROM seoclerks.members WHERE USERID='9' limit 1	1	SELECT profilepicture FROM seoclerks.members WHERE USERID='9' limit 1	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_member_profilepicture()
SELECT * FROM seoclerks.members WHERE USERID='632' limit 1	1	SELECT profilepicture FROM seoclerks.members WHERE USERID='632' limit 1	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_member_profilepicture()
SELECT * FROM seoclerks.members WHERE USERID='306632' limit 1	1	SELECT profilepicture FROM seoclerks.members WHERE USERID='306632' limit 1	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_member_profilepicture()
SELECT * FROM seoclerks.members WHERE USERID='237615' limit 1	1	SELECT profilepicture FROM seoclerks.members WHERE USERID='237615' limit 1	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_member_profilepicture()
SELECT * FROM seoclerks.members WHERE USERID='37890' limit 1	1	SELECT profilepicture FROM seoclerks.members WHERE USERID='37890' limit 1	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_member_profilepicture()
SELECT * FROM members_ledger WHERE script='/opt/clerks-staging/docroot/viewfaq.php' AND querystring LIKE '%id=15112%' AND added>=UNIX_TIMESTAMP(NOW())-1200 GROUP BY USERID	1	SELECT USERID, username FROM members_ledger WHERE script='/opt/clerks-staging/docroot/viewfaq.php' AND querystring LIKE '%id=15112%' AND added>=UNIX_TIMESTAMP(NOW())-1200 GROUP BY USERID	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() ()
SELECT * FROM categories	1	SELECT * FROM categories	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() parseRedundantQueriesCache()
select * from categories_software order by name asc	1	select * from categories_software order by name asc	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_GetSoftwareCategories()
select * from categories_wanttobuy order by name asc	1	select * from categories_wanttobuy order by name asc	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_wantcategories()
select * from categories_wanttotrade order by name asc	1	select * from categories_wanttotrade order by name asc	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_get_tradecategories()
select * from categories_faq order by name asc	1	select * from categories_faq order by name asc	/opt/clerks-staging/docroot/libraries/adodb5/adodb.inc.php 1899 CacheExecute() insert_GetFaqCategories()