Let me give a quick explanation:
Website: Is a collection of related pages of text, graphics, and images, videos that rents space on the Internet. It can be as many pages as you'd like. You can create web sites with places like therapysites.com which charges $59 a month. Or you can have an independent web designer create the site and you can download free designs from places like nodethirtythree.com which requests you give them credit on your site for use of their free designs.

You can hire web designers that can charge anywhere from $500 - $10,000 for your website. I have great designers that charge anywhere from $500 - $1000, depending upon the amount of prep work you do. Once the site is complete it usually costs around $100 a year for web hosting.

Web Hosting:(wikipedia) A web hosting service is like a landlord. You rent the space from them to place your website on. Many sites offer extras beyond space, they offer optimization, web design and advertising. The first thing to look for is load time. Have you ever gone to website and it takes forever to load, it sometimes has to do with how the pages are designed and it can have to do with load time. I also look for how often the server is down. Which means your web site would be down on the internet. I have been using Blue Host, they offer unlimited pages, The cost is about $100 per year and I have to say except for the rare incident my site has not been down. They are upgrading their systems often and improving quality

. Here you can go to Blue Host and sign up. They will know the referral came from my site and that helps me earn rewards, so I appreciate it.

Social Media sites, Directories: these are all places where you can usually join for free and post information about yourself online. I would use these sites to help you improve your ranking with the search engines. Recently Facebook and othe sites have become more business friendly. I am also following many people on LinkedIn struggle with how to use Facebook and Twitter.

Search Engines: google, yahoo, msn, bing, etc. these are the major search engines out there. Having a web site is not enough you must have that site found by people searching. The goal is to be on the first page of a search. So for me, if you google Santa Monica psychotherapist my link is on the first page below the paid for ads. You can pay for placement or you can do what is called an organic search.. I spend very little money on advertising my site and my placement is an organic one.

Search engine optimization: This is a collection of tasks designed to create a good placement (ranking) with the search engines. Like I said you can pay, any of the search engines offer means of paid sponsorship (pay per click, sponsored ads, advertising). Or you can create an organic optimization without paid advertising on the search engines.