Semantic search existed before Hummingbird, even though the new algorithm is the first to incorporate it completely to its ranking system. Semantic search enables users to search whole sentences or phrases and get results based on the collective significance of the keywords in those phrases. While there are quite a few different characteristics of Hummingbird that SEOs must bear in mind, semantic search is important since it alters how we think about keywords.
The first step when beginning the SEO of a site is discovering its semantic core. The activities that need to be carried out are neither straightforward nor will they be reduced to an automated check. The work is manual and I can say it’s related to marketing research.