This mechanic is something that is optional to the players and usually works with more experienced players. When players are going to do a boss fight in a role playing game they will prepare themselves or ‘optimize’ their layout so that they have a better chance of defeating the enemy. This can be in the form of upgrading their equipment so that they have better Armour and weapons or by changing the Heads Up Display to suit their needs.
A good example of this mechanic being used is in all MMORPG games. The player can change the layout of the skill bars in the hood and move abilities about so that they feel like it suits them best and will allow them to perform better. This also occurs to armor and equipment as players will buy new equipment that matches their level so that they have increased stats against the boss.
Another good example of this mechanic being used is in racing games such as Forza. After the player has completed a few races they will have received rewards such as money and new parts. To optimize their car so that they have a higher chance of winning the race they will purchase new parts that increase the stats such as speed, acceleration, and handling. This then means that they have a better vehicle and can win the race.
If I was to use this mechanic in my own game It could be in any but for the sake of an example, I would choose a role playing game. The player will equip the best armor that matches their level so that they have higher stats and can easily complete the quests.