When multiple advertisements use parallel structure -- for example, by incorporating the same colors, visual pattern, design themes or organization of elements -- the campaign as a whole feels ...

Parallel structure (or parallelism or parallel construction ... catching, having) in my example. Alternatively, I could have easily written, “because I like to think about grammar, catch other ...

This is what is referred to as preserving parallel structure. For instance, nouns must match with nouns, adjectives with adjectives, prepositions with prepositions, and adverbs with adverbs. In order ...