Need suggestion for Job searching!

I am searching for job.and i have created an Linkedin Profile. all the information added.
I confuse about the Profiles section : - first name and last name after that one option is Head Line. what should I enter the headline so that i can get more response from the companies. Hope you understand my issuse also any new tips to improve my profiles what should i enter other details.

Hi, You should add Hash Tags with area of interest and prior specialization you have in domain