Cluster Research tool shows all keyword that are semantically related to the researched query, i.e. there're at least two identical pages in top 20 search results for the researched keyword and its related keyword from Cluster Research.
Volume - the keyword’s average monthly search volume
CPC - the keyword’s cost-per-click
Competition - the competition level for the keyword
Connection Strength - the number of identical URLs in search results produced by the researched keyword and its analogue from Cluster Research. The maximum value of Connection Strength may equal 20 search results.
Filtering and Sorting
The returned list of keywords may be filtered by connection strength and presence of place names.