What you need to know about SEO for 2015 for a beginner?

Question

Search Engine Optimization

Such a situation, I create a site for a friend and he asked to promote it in search engines as it will be :)
The theme of the site will be about home renovation.
I plan to make a couple of pages on the site and on some page there will be a transition to the blog (I haven’t really thought about what and how to do better yet) if you know or can give advice on this, I’ll be glad :)
I looked through the Internet for a week and didn’t find particularly sensible articles: (everywhere they write superficially and at the end of the article they offer their promotion services, but I would like to figure it out and make it myself (I make the site for free)
I know for modern SEO you need:
- interesting and unique content (though I don’t know how to make it unique directly)
- graphics, videos
- update regularly
- social buttons
- site search
- use micro data markup
- monitor validity
- there should be only one H1 on the page
- adaptive layout
- work on a semantic kernel (I don’t really know what it is and if you can explain or throw off a link to an explanatory article I will be grateful)
- work on the analysis of metrics and various statistics systems
- set up caching on the site
- and calculate some queries there
. Now the question is: what else is needed for the SEO of the site for 2015 so that it can be raised in the search as high as possible?
tell me a sensible article (instruction) where you can read everything from A to Z (if there is one)
ps I know about Google and Yandex webmaster tools

Answer 1

The site is going to make a couple of pages

the exhaust will be the same from the site, for "a couple of pages", somewhere on the 20th page in the search results, especially considering

unique content (although I don’t know how to make it unique)