Motivation is what drives the character to achieve those goals. They need at least one strong motive, but are likely to have several in a novel-length story.
The motivation is the because of your character's goal and can never be too strong. It is the reason he/she wants to reach the goal and what drives him/her to achieve it.
Characters are better understood through their internal motivation, rather than reactions to external incidents. E.g. readers are more sympathetic to a character who is motivated to do something because they want to save their dying loved one than if that loved one asked them to do
so, or they have to do it.
When defining motives, ask why your character wants to reach the goal. Brainstorm a list of reasons until you find the key driving force for that character. In the same situation, the driving force for another character is likely to be different, dependent on his/her life experiences, upbringing and
When writing, stay focused on your character’s goals and motivations. If they evolve throughout the story, because of events that happen and personal growth, then focus on the new goals and motivations during the next part of your story. I find it helpful to have a GMC chart for each main
character, which I refer to throughout the writing process.