Hello I have a Acne blog and recently installed a mass DB I bought of a lot of other categories and articles. My question is that as I am focused on Acne, will having other categories and different Articles not related to Acne can and will that affect my SEO? I am aware it is duplicate content, but wanted other things to read. I just hope that since it is duplicate content they wont be counted for search engines and such and my original content will be. I thank any that responds
Few articles will probably won't alter anything but if you regularly post duplicate content then this is not going to go well with any search engines. As for the original articles, i don't think there will be any penalty.