Fluency is the ability to express and connect ideas with manageable effort. Speed is only one small feature. A fluent speaker may pause to plan, correct a word, or emphasize a point while still making the message easy to follow. Rushing often reduces pronunciation, grammar control, and listener understanding.
Automatic speech grows from reusable chunks and repeated retrieval. Practise a short message several times, but change the audience, detail, or time limit so you learn the structure rather than memorize one script. Group ideas into phrases and pause between them instead of hesitating inside every phrase.