Hi Ornob, in my experience on steemit there are different groups that people can join. Some people mainly talk about things that a person would see on the news, some people enjoy sharing a poem that they have written, and some people like to share pictures that they have taken. Just write about whatever you think that the world needs to hear, and if you want to get someones attention just write the @ symbol and then there name. For example if I wanted to recognize you I would type @mrhaldar :)