When you switch on "hints" in the lyric editor you will see your lyrics underlined in different colours. The colours indicate the type of word - noun, verb, adjective or adverbs. Try to aim for a majority of green and purple underlined words, some yellow and few red. This will make your lyrics stronger as it will mean you’re using more verbs and less weaker words such as adverbs. If a lot of your lyrics are underlined in red, or a whole line is red and yellow you might want to try rewriting them as they probably aren’t conveying as strong a message as they could.