The fitness Trainer's content

 The Benefit-Driven Title (Focuses on the outcome)

This title focuses on the results the customer will achieve (saving time, looking professional).

Title: STOP Spending Hours!  15 Professional, Done-For-You Instagram Carousel Templates (Editable in Canva)

 * Why it works:

It uses an immediate pain point ("STOP Spending Hours!") and promises a solution ("Done-For-You"). The inclusion of the main tool (Canva) is a bonus, as customers know exactly what they're getting.