To create a Post in your Community, click the +CREATE button in the upper-right hand corner of your Community page (just above the Feed). Give the Post a title and write some content. You can also use parts of the Post Toolbox to add different forms of content.
If points are enabled in your Community, the yellow bar at the bottom of the Post editor will gradually move to the right as you type. This bar indicates how close you are to reaching the word minimum for earning points, which is set by the Community Owner. When you have reached the word minimum, the bar will turn green, and the number of points you will earn upon submission will appear just above the bar. To submit your Post and earn points, click the POST button.