Your savings bank is offering you 0%, but the problem goes deeper than just "low interest." With current inflation at maybe 2-3% per year, you're losing real purchasing power - your money becomes worth less even if your account number stays the same. That's the thing a lot of people underestimate. If you really won't touch that money for several years, a savings account is actually a bad choice.
That said: Before you dump all your savings into something else, you need to be clear about what that money is for. Do you need it for an emergency fund (3-6 months of expenses)? Then quick access matters more than returns - you could look at money market accounts instead, which offer way better interest right now than your savings account. For longer-term savings (5+ years), you could think about other options, but that's a totally different calculation.
One warning though: Don't just throw everything somewhere else at once if you haven't really thought through what you're getting into. It's tempting to quickly find something with better returns, but some people end up in products they don't even understand or that have fees eating up the returns anyway. Think it through first, then act.