I was ranking on page two for a pretty competitive keyword and decided to optimize my title tag with a catchy title that included my keyword and brand. I also changed the description. A few other onsite things were added during the time like social signals and header for contact info. I re-indexed the entire site and saw my rank from page 2 to page 4. Was it a mistake to change the title? it wasnt optimized at all and yosat likes it now.