Welcome to the Q&A Forum

Prob the most n00b question of all, but once I understand this I will be able to research on my own from here: If a search engine produces results by the keywords from individual website posts/pages, then how are the keywords I choose for my homepage so important if the general homepage meta-tag keywords are essentially ignored by the search engines? Should I repeat my primary keywords on EVERY post, in addition to the ones that relate to that individual post or am I misunderstanding something fundamental? My new site is http://splatterMUSIC.com and I want to be at the top of the results for anyone wanting to watch music vlogs, album reviews, music lessons, funny music-related videos, new non-major label music videos, and all kinds of other concert footage, etc.