
compare it with labels you write and attach to something

you can freely create new tags the moment you need them

tags are more flexible and more "organic": your collection of tags will change over time

tagging is common in linklogging: almost all "social bookmarking" services use tagging

tagging is less structured, more chaotic

tags for different purposes are put on the same level

e.g. tagging by association: words that you think will help remember/retrieve the url

e.g. tagging by purpose: toread, toblog,