Swapping links had been as soon as an innocent advertising strategy until it began to be mistreated. It could be seen as a manipulation attempt if you’ve been exchanging lots of links with clients.
Duplicated content. Ideally this one’s obvious: any duplicated content in your web web site causes it to be less beneficial in Google’s view, and therefore could result in a penalty. Make fully sure your content is unique and well-written; usage tools like Copyscape.
Overusing H1 tags. Precisely content that is structuring with Search Engine Optimization. The H1 tag helps Bing to know exactly just exactly what the web page is all about.