This step is to refine the previously written lines into more refined way. At this step, you can further explore relevant phrases, idioms, proverbs or slangs etc. and fit your brand message into them. Even though you are left with one word, go ahead and analyse if it aligns with the brand overall.
Additionally, you can refine, retouch and polish till it gets approved. Write and read like a consumer and not like an Ad-Man. Read and analyse, see if it incites your own consumer mind or not. If it doesn’t work on you, it probably wouldn’t work on the masses either.
Concluding, writing a tagline is a simple yet overwhelming task. The things to keep in mind are to align your audience and message, keep it simple and short, make it timeless and easy to recall.