>If enough English speakers decide that some word or phrase has value, to the extent that those who encounter it are likely to need to consult the dictionary in search of its meaning, then it is put into new editions.

as an example (no value judgment made), the review edition (online) of OED has included the word 'webzine' (it's their word-of-the-day today). [no entry for 'google' yet, other than the cricket sense..]