I need a bunch of well written articles in the web design industry.

Num. of articles: 12
Words per article: 500
Information for the blog/website: We develop websites.
Industry: Internet/Software
Topic: Mixed.
Tone: Informal/Casual
Outline & Structure: Applicant must optimise these articles for search engines by using keywords found in the titles. Each 500 word article must be split into a minimum of 6 paragraphs. Subheaders would be great if appropriate to the article (this may differ between topics)
Extensive research needed: yes
Extra notes: Please, only serious buyers bid on this job. I need these quite urgently (preferably within a week) and am willing to pay good money to get them right. Grammar must be excellent, tone must be professional but more on the informal side; warm and welcoming but not immature.

The articles are for content on my own web design website, ironically. I've gotten snowed under with other work but want to get this site launched ASAP. The articles will constitute pages, and as such need to be at least 500 words each, split into a few paragraphs.

The pieces will all take the form of 'What is'x' and what can it do for me?'
Each article will try and sell 'x' to the readers, who will primarily be business owners contemplating investing in a website. 'X' will be:

1. On-site Blogs
2. Search engine optimisation
3. Speed optimisation
4. Mobile responsiveness
5. Facebook marketing
6. Twitter marketing
7. Pinterest & Instagram marketing
8. Other social media avenues
9. Professional email (you@yourbusiness.com)
10. Directory listings

Please entitle these articles carefully and don't make them all look the same.

In addition to the articles in that format, I also require:

1. An introduction to social media for business
2. EU Cookie Laws and the current guidance

The applicant should be able to complete all of these within the timescale given (preferably under a week). If you are unsure of any of the subjects and are not willing to do extensive research, please do not apply.