Matt Cutts, in a comment on his blog, explains the differences between the Google terminology "data push" vs. "data refresh". Of course, we really don't get a clue as to what either of them actually is...but well, I'll let you read it for yourself.
A data push is a superset of a data refresh (that is, a data refresh is an instance of a data push). Typically a data refresh is something with a well-established history, e.g. we have automatic tests in place and the data to be sent out is sent out automatically (assuming that all the automatic sanity checks pass). A data push may tend to be less automated and thus may undergo more evaluation. But the terms are often used interchangeably by Googlers, because we know what we mean, so you're pressing for a pretty fine connotation.
So, there you go. Now you can throw both of those terms out freely, and unlike the Googlers, you WON'T know what you mean. LOL.
Added: Just to make sure everyone has all the info on this terminology, I refer you to Rebecca's notes on the Matt Cutts video where he attempted to further define a data center (based on a question I asked him), in which he said:
The smallest change is called a data refresh, and that's essentially you're changing the input to the algorithm, you're changing the data that the algorithm works on.
Me having to register and login to your blog to comment is a data push.
You going to your admin panel and unchecking “Must be logged in to comment” will allow for an easier comment refresh.
People tend to like the regular comment refresh and not the push, the push requires too much work and you will get few people commenting even if they read your blog.
The V7N blog does this also, I am not sure if he doesn’t want comments or just doesn’t know what box to uncheck in admin.
I will have to go over there and push this idea sometime. =P
=P
Because you are so clever, I’ll give it a try. But if the spam gets out of hand, or the moderation becomes too much of a pain, I’ll put it back. Fair? 🙂
enable “askimet” (in your plugins area) and you will be good, you need to get a key but all you need is an email address.
if you still get spam (and I doubt you will) you can download a plugin for wordpress called “bad behavior”.
good luck!
Sorry, Aaron, but I tried it and was immediately flooded with spam. Yes, akismet caught most of it, but I still had to deal with it. I care about my users, but they’ll just have to take the extra step to comment.