Itemization

Itemization in League of Legends is a crucial aspect of building your champion's strength and adapting to the needs of the game. Choosing the right items based on your champion, the enemy team composition, and the state of the game can significantly impact your effectiveness in matches. Some useful guidelines for itemizing effectively include trying to avoid buying utility items such as grievious wounds on carries as they are often more effective just buying more damage, and making sure you buy the proper resist items as a tank by looking at the enemy team's damage spread.

Image of multiple items such as Stridebreaker, Heartsteel, and Eclipse

With over 100 full items and even more component items it can very difficult to know when to go what item. Most champions have 1 or 2 core items that they will go every game, allowing them to be more flexible afterwards. While the real answer is to gain more experience on a champion so you know what items work well in certian situations, you can also use external site such as Probuilds to see what highlevel players build.