As your player level increases, you gain more talent points to use.
Talent points are used on the Talent Tree.
Talent tree is located on Player Profile page under the "Talent" tab.
Inside the Talent Tree, you can choose to use these points for Economy
or for Military.
Many players choose to focus on either production or military.
For example, if you are a farmer type player then Economy and
if you are a war type of player then Military.
You can reset your Talent points and reuse them on any tech within
either of these tree. You simply need to purchase a Talent Reset
(Can be bought from guild shop for 35k Guild Coins).
This is a useful tool to buy as you can change your talent multiple times.
For instance, if i am farming or producing more then i switch to economy
and when i am wanting to fight, then i switch all to military to pick up the buffs.