G_Lee - 5:01 pm on Mar 7, 2013 (gmt 0)
Thanks for all the replies. I am glad that the topic generated discussion.
I will follow-up on my original question.
The page about which I was originally inquiring was ranked on Google Page 1, Position 8 for a while. The page has a moderate amount of on-page optimization; however, with no bold typeface for emphasis, just some <h2> and <h3> headers for organizational purposes.
I needed to add some content to improve click-through and conversion rates, as this content would benefit and interest my prospective clients.
I added about 500 words of keyworded content in 5 paragraphs, each with its own <h3> title.
When I made the original post, I wanted to find out about the SEO effect of boldface keywords.
To err on the side of caution, I placed one occurrence of the targeted keyword phrase (2 word combination) per each paragraph in total in bold, for a total of about 7 occurences.
About a day or so later, my Google ranking went to position 9 and then position 10, which remained for a couple of days. At this time, I was worried about being bumped off Google Page 1 for the search.
I then removed the boldface from the 7 keyword phrase occurences, with no further modifications. I should also mention that I have not been link-building for a couple of weeks
Within one day, my ranking almost immediately rose to position 7 for that particular search, my highest ranking yet.
Perhaps my experience will shed some light on the discussion. Your comments are most welcome.