Hi Halkoy
Firstly how are you ? Now i discuss about your question. SEO mean Search Engine Optimization. There are two types of SEO 1. On page seo 2. Off page seo.
1. On page seo :
On page seo are many types 1. Keyword recherche for your website 2. Related keyword selection 3. Long Tail keyword selection 4. keyword on your website content 5. keyword on your website permalink.

2. Off page seo
Off page seo mean create back link of your website on other web site :
1.Directory submission
2.Social Bookmarking
3.Blog Comment
4.Guest Posting
5.Web 2.0(at least 14 site and make tier 2 backlink for this web 2.0)
6.Traffic blast from Reddit/Backlink
7.Ques/ans sharing sites
8.Doc/pdf sharing
9.Audio Sharing sites
10.Youtube comment box
11.Social Profile link
12. .edu/.gov backlink
13.academia.edu
14.Imgur.com
15.Finding competitor backlink
16.Infographic submission
17.PBN(Private Blog Network)--Blackhat Method...100% working superhit method
18.GOOGLE PLUS PROFILE link

Follow that instruction i thin you get success.