vocabulary

"Speeding" usually means "driving faster than you are allowed to drive."

You can be fined by the police for speeding.

Thanks for your reply
but I wanted to know whether it is possible in that sentence that I wrote or not
please answer

XSIs the following sentence correct?Speeding is important.

Yes. But these are better for an actual meaning:
Speeding is dangerous.
Speeding is illegal on most highways.
Speeding is risky.
Speeding can land you in jail.

OK, thanks for your answer

XSThanks for your replybut I wanted to know whether it is possible in that sentence that I wrote or notplease answer

It would help if you give a context. Each one is possible in different situations but, which one to choose would depend on a context.

Thanks
but in general point of view:
speed is important. is OK
but
speeding is a bad thing.
as AS gave me some examples, and I would like to rewrite one of them:
Speeding is risky.
So from this viewpoint, I think speed is more positive, and speeding is almost "negative".Therefore using speeding with the adjective "important" is rather unusual

XSTherefore using speeding with the adjective "important" is rather unusual and convoluted, isn't it?

Important for what?
The context is missing. Can you use important in a context that is meaningful?
This really does not work very well:

Speeding in a fast car is important if you want to be a successful bank robber.

Thanks
AS your reply was so helpful
but I mean if you don't add anything beside "important" it is better "speed" to be used instead of "speeding".
I agree with you %100, in the following example, both speed and speeding can be used interchangeably
Speeding is important to win the car race.
I guess, "speeding" is almost related to "driving fast" as I was told. So

XSboth speed and speeding can be used interchangeably Speeding is important to win the car race.

I disagree. "Speeding" means going faster than the speed limit in a vehicle.

There is no speed limit in a car race.
Speed is important in all races. Foot races, car races, swimming races, etc.

XSSo I think, grammatically using speed instead of speeding is more appropriate i

No, grammatically they are equal.
However, the meaning makes "speeding is important" an unlikely (but not impossible) idea.