Think of a retirement account as a special container for your investments. It's not an investment itself, but a type of account that gives your money superpowers—specifically, tax advantages designed to help it grow over the long haul. The goal is to build a nest egg for your future self.

Two of the most common types of retirement accounts you'll hear about are the 401(k) and the IRA.

A 401(k) is typically offered through your job. You contribute a portion of your salary, and sometimes your employer will even match your contribution up to a certain percentage. It's an incredibly powerful tool for building wealth.

An IRA is something you set up yourself. This is a great option if your employer doesn't offer a 401(k), or if you want to save more for retirement beyond your workplace plan. You have more control over an IRA, but you don't get an employer match.

The biggest benefit of these accounts is how they're treated by the tax system. This isn't about avoiding taxes, but about choosing when you pay them. This choice can make a huge difference in how much your money grows.

Retirement accounts generally come in two flavors: Traditional and Roth.

• Traditional (Tax-Deferred): With a traditional 401(k) or IRA, you contribute money before it's taxed. This can lower your taxable income for the year, which is a nice immediate perk. Your money grows over the years, and you only pay taxes when you withdraw it in retirement.

• Roth (Tax-Free Growth): With a Roth 401(k) or IRA, you contribute money that's already been taxed. The magic happens later: your investments grow completely tax-free, and you pay zero taxes on withdrawals in retirement.

When it comes to investing, you have a secret weapon that older investors don't: time. The more time your money has to grow, the more powerful the effect of compound interest becomes.

Compound interest is when your investment earnings start generating their own earnings. It's a snowball effect. A small amount of money invested in your 20s can grow to be much larger than a bigger amount invested in your 40s, simply because it had more time to compound.

Let's look at an example. Imagine two friends, Alex and Ben. Alex starts investing $200 a month at age 25. Ben waits ten years and starts investing $300 a month at age 35 to try and catch up. Assuming they both get a 7% average annual return, see how much of a difference that 10-year head start makes.

Even though Ben invested more money each month, he couldn't catch up to Alex's head start. That's the power of compound growth. The single most important factor is not how much you invest, but for how long.

Ready to check your understanding of these foundational concepts?

Getting started with retirement savings is one of the best financial decisions you can make in your 20s. By understanding the tools available and leveraging the power of time, you're setting yourself up for a secure future.