What's a 401k and/or other smart investments, and how do they work?

Like stuff in the stock market or w/e, just curious but would prefer detailed explanations on what they are. how they work, and how to go about managing them well

A 401(k) plan allows a worker to save for retirement while deferring income taxes on the saved money and earnings until withdrawal. The employee elects to have a portion of his or her wage paid directly, or "deferred", into his or her 401(k) account. In participant-directed plans (the most common option), the employee can select from a number of investment options, usually an assortment of mutual funds that emphasize stocks, bonds, money market investments, or some mix of the above. Many companies' 401(k) plans also offer the option to purchase the company's stock. The employee can generally re-allocate money among these investment choices at any time. In the less common trustee-directed 401(k) plans, the employer appoints trustees who decide how the plan's assets will be invested.

Some assets in 401(k) plans are tax deferred. Before the January 1, 2006 effective date of the designated Roth account provisions, all 401(k) contributions were on a pre-tax basis (i.e., no income tax is withheld on the income in the year it is contributed), and the contributions and growth on them are not taxed until the money is withdrawn. With the enactment of the Roth provisions, participants in 401(k) plans that have the proper amendments can allocate some or all of their contributions to a separate designated Roth account, commonly known as a Roth 401(k). Qualified distributions from a designated Roth account are tax free, while contributions to them are on an after-tax basis (i.e., income tax is paid or withheld on the income in the year contributed). In addition to Roth and pre-tax contributions, some participants may have after-tax contributions in their 401(k) accounts. The after-tax contributions are treated as after-tax basis and may be withdrawn without tax. The growth on after-tax amounts not in a designated Roth account are taxed as ordinary income.

As for the stock market i have no clue. The stock market takes a lot of time and dedication to succeed. If you want to get into the syock market id recommend a mentor for that.

books are written about every aspect of what you are asking

401k is named after the chapter and paragraph in the US tax code that allows someone to invest tax deferred

tax-deferred just means that you are not going to pay any taxes on the money until you are ready to collect on it, at that time you are hoping that you have built a whopping big pile of money and that when you retire you will be in a lower income bracket which means less tax owed

once you put your money in there are rules about how you can access it

the things that the funds are actually invested in (like stocks, mutual funds, bonds, etc) are chosen from a menu of different choices that you would select from trying to guess which types of investments will do best

it is a lot of fun and very interesting

until you need the money, then it is gutwrenchingly stressful