You can deactivate it in the Settings page on https://www.share2steem.com
If you deactivate it, you won't benefit from the trail (meaning others won't automatically vote for you when you post). It is a give-and-take system.
By default, we will only use your Voting Power (VP) if it is greater than 98 %
This was explained in the point 4) of this post.
this is not good for me this service is use my vote power for other user
As said before, you can deactivate curation trail on settings page on share2steem website. But other members won't vote for you.
I can see that you deactivated it.
So now it will never vote on your behalf again.
But you won't receive any votes from the curation trail (from the other users of the @share2steem app)