My users commonly create new pages with similar/duplicate content.  For example:http://example.com/post?123http://example.com/post?456I've therefore disallowed these pages in the robots.txt file.But my users also created a lot of backlinks to these pages.Is there any effective way for me to pass the link juice or redirect the crawler from these pages too the start page?
Allow crawlers to pass link juice from similar and duplicated user created pages
htaccess;web crawlers;robots.txt;backlinks
Juice only flows in and from pages that are indexable.There is no secret squirrel code to change this outcome.Some people and some sites may suggest to use: <META NAME=ROBOTS CONTENT=NOINDEX, FOLLOW> The follow command used within the meta will only inform Google to follow links to discover new pages, it does not imply to pass juice. Selectively Select Quality ProfilesIf you want to be rewarded then you can selectively enable index on those pages that are considered high quality.Not all links are born equalYou should also note that even if the profile page is considered unique content, the backlinks created for this page may have a:Big EffectSome EffectNegative EffectLittle EffectNo EffectDue to the high volume of backlink abuse over the years Google has fine tuned what type of links it rewards, some links may help the site, some may not at all. If the site has too many incoming backlinks that are not relevant to the topic of the site then you should expect this to work in a negative way. For example, if your site is about IT hardware reviews, and you have one user profile with a 100 backlinks from various sites about animals and cats, then you should expect that to either have no effect, or a negative effect. 