At first, the website has 1000 unique visitors everyday. But then as the time passed by, the traffic dropped by 100. Now, the website has 100 unique visitors only everyday.
Having a hundred visitors everyday is really a problem. Especially if you'll consider its previous daily traffic.
But it is of course expected to happen if you did nothing to maintain the traffic.
So what should we do:
1. Get more backlinks. Search engines updates their algorithm almost every month. But the main ingredients of it never changed. And it is the backlinks. So, don't ever seized getting backlinks for your blog.
2. Post more articles. It is always said that content is the king in the make money online world. SEO is nothing if you don't have the content. So, always post new content.