[Does staying online all the time help in getting order?]

Bottom line. Yes it does help with getting orders, since you appear for people searching for online people.
But: it is not worth in the long run. Your work quality will suffer as well as your quality of life.

[Hy to Fiverr community]

Since you are doing ads, your description should reflect your ability to sell something to people in a few words. I dont think your description does that at the moment. Come up with a more engaging headline by adding flesh to I will be your social media manager. It is questionable, whether people search for that phrase on fiverr, too. Try to bring facebooks ads in the description. Make a gig for every management service you provide (facebook, instagram, tik-tok. etc.)