And answers
This entails external link analysis, unnatural links, anchor texts, headers, Alt and Title tags, spam audit (cloaking, hidden text, hidden links, background colored text, etc.), quality of content of pages, and more.
Increasing your popularity with in-bound links is important. It increases the pagerank, the domain authority and will give additional leverage. The links from other Web sites are called backlinks. There are several options available to realize this: