You have been here for at least 7 months and in that time you have been getting down voted for: double posting the same comments, just posting “ . “ as a comment, and posting inaccurate or irrelevant comments. Your REP is probably negative in multiple communities. I STRONGLY encourage you to read the link suggested by others before you post anything else. That said, a brief overview is below.
If you want to earn REP or to have posts that are likely to get Up Voted, you have to understand the Community that you are in. To get to know what a Community is like, spend some time there and read and get a feel for the kinds of articles that are relevant to that community. Both “Relevant” and “Spam” will be good examples of what to post and what not to post.
When in doubt, read don’t post. Posting will NOT earn you REL Coins and will only irritate active members if the post is irrelevant. As a rule of thumb, if you don’t know what will or will not be relevant, you should not be posting in that community. That said, you can still bet/stake on posts.
By reading content and providing accurate and insightful commentary or analysis, you can grow your Rep. By betting on which content is likely to be the most relevant, you can earn Coins. It is in all of our interests to Up Vote/stake on good content and Down Vote all bad or irrelevant content.