How to adapt a landing page for a lot of key phrases?

Question

Java

Hello, there is a landing page that is optimized for a keyword. So let's say this phrase has many different "tails". I want to optimize it for phrases with tails, there are several options for doing this:

1. Make a lot of landings for each key phrase + tail (place them each on a separate page)
   
2. Use services for dynamic content replacement, respectively, the landing will be 1
   

I am new to this, and I don’t understand a little if the first method will affect the position of the site in the search, if so, how?! Thanks for answers.
PS Yes, I'm new.

Answer 1

f = a*Math.tan(x)+b*Math.abs(x);

Answer 2

Well, if you are a beginner, then yes to you in the services, there is support that tinkers with you by phone, well, pay from 2 thousand rubles a month.
There is an option to actually do it yourself, but since you are not strong in programming, then only the above option remains.