Skill

Skills are talents that Sims need in their everyday life and to advance in their working career. There are the following Skills that can be learned:

Cooking, Mechanical, Charisma, Cleaning, Body, Logic and Creativity.

A few examples for what Skills are needed in everyday life:

When Sims know how to cook they won't burn their food so often (or even set the whole kitchen on fire)

If a Sim is experienced in Mechanical, they can repair broken things in the household faster and the chance of electrocution while repairing e.g. a Trash Compactor or TV decreases significantly.

Sims with high Charisma tell better stories and Jokes and are not too likely to be rejected for these interactions by other Sims they might wanna make friends with.

Sims will clean things in the household a little faster if they gained enough cleaning skill (although some think it also depends on the neatness of each Sim)

The Bodyskill of a sim is built by using treadmills or weights. When Sims are fat, they can train and not only get thin, but also stronger. When two sims fight with each other, it is said that the Sim with the higher Bodyskill is more likely to win the fight.

The creativityskill, when high enough, will lead to Sims who create masterpieces on the easel that sell for a lot of money (sometimes as much as over 600 simoleons) or novels, that can bring in up to 2500 simoleons! Also they will get tipped higher when they play an instrument in public and might leave the place with much more money than they came with.