Why is it important? With a higher return on your savings, you will get more wealth over time (try it out using the compound-interest calculator). Keep in mind that it is the return after fees that matters.
Why is it important? You get a higher return by taking more risk. But the more risk you take, the greater the chance that something bad will happen. Think about how much risk you want to take!
Why is it important? If you save more long-term, you can take more risk in your savings. If you do not need the money right now, you may be able to invest it in stocks or other assets where you can get a return. If you need the money soon, it is better to save in something safer, for example in your bank account or in a fixed income fund.
Why is it important? It is good to have some savings (a buffer) in case you have any unexpected expenses. Think about how much money you need to have in reserve, and think about whether you can invest the rest of your savings in some way so that you get a return.
Why is it important? It is always important to think about what else you could do to make more money. Instead of buying the most expensive product, maybe you can buy a slightly cheaper alternative and instead save the money? Or buy something else?