Short explaination about Google +1
To use Google +1, you need to have a Google profile. Google remembers any sites you +1ed and this influences your Google searches and possibly those of your friends, if Google knows you’re friends.
Of course, this involves telling Google about what you like, and Google will make use of that data to show more relevant search results and to give you “better” ads (that are more likely to be of interest to you).
However, this also enables me to see what kind of articles are most popular, since I have access to anonymized statistics. I can concentrate more on these kind of articles then and bring more interesting stuff to you. Of course, I’m still basically writing whatever is on my mind here.