Key research analysis
 

Will these keywords used in the appropriate page (recommended quantity is every page three to five key words), and from the top left corner start, optimize the downward.

What you mean by starting top left optimization??

Research competitors strength and keywords difficulty, rival site optimization should also be taken into account, including the site structure and page optimization for keywords.

It is suggested to take into consideration strength of research competitors and keywords. Equally important is to consider rival site optimization. It is necessary to consider website structure.

for keyword research you could use google keyword tool.

Yes you should use the Google tools.

Google Adword is the best tool for Keyword Research.

Thematic analysis is the most common form of analysis in qualitative research. It emphasizes pinpointing, examining, and recording patterns within data

It will be better if you use only 4-5 keywords to optimize a page. Only then you can rank the keywords in the search engine.