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I would like to know what the 3rd number in the screen shot is? It from this design-pattern filter page I recently subscribed to.

Hovering over the tag on SO shows 3.5K followers. So this is not even nearer to the number. I had somewhere read before that the number(3.5K) is the sum of users that has it as a favorite or has subscribed it.

So, in this case we see 183 email-subcribers, 3.5K follower(from the tag hover), then what is the below 7 users following?

Tag follower

Please let me know.

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I would imagine that, if it's in your list of "favorite tags," you are following it. I've always kinda wondered this, but was never curious enough to ask. –  Robert Harvey Nov 22 '12 at 18:28
    
Confirmed: Adding a tag to your list of favorite tags increases the follow count by one. In near real-time, too; that's fairly impressive. –  Robert Harvey Nov 22 '12 at 18:35
    
ok cool. Then what is 3.5k number in this case then? –  mtk Nov 22 '12 at 18:41

1 Answer 1

up vote 1 down vote accepted

That is the number of people who are following the filter on Stack Exchange. Filters are different in that they are not limited to a single tag. You can add multiple tags to them, and even span multiple sites. For example, I'm the only one following my specific "Favorite Tags" filter:

Favorite Tags Filter

So, it would appear that there are 7 users on the Stack Exchange site itself who have followed the filter for that single tag on Stack Overflow, while there are 3,353 people following the tag on the actual Stack overflow site.

There is a difference with the subscription feature, though. Subscribing to a tag directly on a site automatically subscribes you to that tag's filter on Stack Exchange (they are one in the same). Following a tag on a specific site does not achieve the same result.

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Great didn't knew correctly about filters. –  mtk Nov 24 '12 at 11:59

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