Is the group of words in bold a phrase or a clause?
The most successful advertising slogans are those that have the ability to endure, such as "Just do it" or "When you care enough to send the very best."
Phrases are those sentences in which there are no verb and subject while clause are those set of words in which there are both subject or verb in them.
The clause is generally used as a single part of speech. The phrase is a collection of words combined as one single unit.
In the sentence "Just do it", there is a verb but no subject in it. Therefore, it is the phrase . On the other hand the sentence, "When you care enough to send the very best", "you" is the subject here while there are two verbs "send" and "care" which makes it a clause.
