This newer use defines mostly mainstream music. Catchy, simpler rhythms, repeating chorus, minimal (or no) guitar, heavy drum beats, streamlined lyrics that don't really have a deeper meaning, and so on. Acts such as Britney Spears, Lily Allen, late 80's/early 80's-on Michael Jackson, Christina Aguilera, and the like... would not be categorized as rock, hip hop, R&B (while a common element of pop music), metal, blues, or anything else... it would be categorized as "Pop Music". It is a genre as well as a term referring to music that is popular.
The Jackson 5
The Spice Girls
"pop" is deemed to mean more than popular to record copanies, they see it as an actual type of music, a particular sound. A money-making sound. Don't confuse yourself thinking you dont like "pop" music though.
(*please note if she referred to herself as an artist in my presence i would donkey punch her)
"Hi Im Jake Teblaauznikov, I am an overweight 30 year old Russian man. I make music inspired by Britney Spears, basically exactly the same to her music, but noones heard of me and noone buys my record, I am not a pop artist"
Pop music is also often maligned by music elitists and critics. But, the one thing you have to remember is that pop music is mostly intended to be fun and exciting, not some deep emotional work of art; although pop music can be deep and emotional at times, contrary to popular notion.
... and the list goes on...
bob: Yeah..i heard some people called him, ''The king of pop music''.