So an article about how chiropractics can help cope with the stress of gas prices would make it relevant to your site. Now suppose someone does a query in Google about "coping with high gas prices." When your article has been indexed, it would show as having strong "relevance" (Google`s mission in life) to that query.
In other words, your site would show up in some or another level---your ranking. That increases your visibility. If two chiropractic sites are both pretty much equal, both in the same geographic area, and both offer about the same brand, the one people see first likely will take more market share.
Your efforts on Web marketing are toward visibility---being seen by more people.
As for loading time....that`s a technical issue beyond my basic understanding of developing Web sites.