how do I advertise a new website?

[Chris]

There are a lot of definitions of SEO (spelled Search engine optimisation in the UK, or search engine optimization in the US) but lets face it, SEO in 2013 is about getting free traffic from Google, the most popular search engine in the world.
It’s about KEYWORDS and LINKS. It’s about RELEVANCE and REPUTATION. It is about VISITOR SATISFACTION. Search engine optimisation is about a web page being relevant enough for a query, and being trusted enough to rank for it. It’s about ranking for popular keywords for the long term,on merit. You can play by ‘white hat’ rules laid down by Google, or you can choose to ignore those and go ‘black hat’ – a ‘spammer’. But MOST SEO TACTICS still work, for some time, on some level, depending on who’s doing them, and how it’s deployed.
Whichever route you take, know that if Google catches you trying to “modify your rank”, then they will class you a spammer, and your site will be penalised (you wont rank for important keywords). Google does not want you to try and modify your rank. They would prefer you paid PPC to do that. The problem is – traffic from SEO is valuable. REALLY valuable. And FREE, once you’ve pleased Google enough.