Advertising your server is quite easy. It is one of the only ways to bring new players to your server. There are quite a lot of advertising websites you can use for Minecraft that also use a voting system that requires votifier. Votifier gives items to people who vote for your server in exchange lifting you through the ranks!
Here are some quality Minecraft server list sites for you to have a look through!
Creating an account on all of these will bring a wider range of players to your server and help improve your experience.