People generally define inflation on the lines of too much money chasing too few goods and therefore causing everything to become pricier.
I prefer the classic definition of inflation - it is simply an expansion of the money supply. Everything else is a result of that.
In normal times, inflation is a tax - a hidden tax, and a big one at that. Governments and central banks simply print money out of thin air to pay off their debts (long term borrowing) and thus release more money into the system. As a result, the price of everything goes up, while average people's income remains stagnant (or may even reduce). Thus, one is pinched hard by inflation, which is also a hidden form of taxation for governments.
However, what we see right now is a mix of both, governments printing more money out of thin air, and prices going up due to supply side constraints for raw materials, especially fossil fuels and food. This is caused by Poo-tin's genocidal invasion of Ukraine, long term economic effects of the worldwide pandemic, disruption of supply chains for certain components (such as semi-conductors) and similar reasons.
Energy inflation affects almost every average person across the globe. The costs of automobile, cooking & heating fuels have gone up alarmingly this year, and electricity costs have also gone up in places that largely depend on fossil fuels for electricity generation.
The world has no choice but to move away from fossil fuels in the long run. While I hate nuclear energy because of its risk and the radioactive waste it generates, I understand it has a big part to play in energy security, especially considering the unsteady output of renewables like wind & solar which make them unsuitable for base load power generation.
I'm glad the world is moving slowly but steadily toward more sustainable forms of energy. The future definitely lies in renewables and batteries. Even in a Third World country like mine, EVs are becoming popular.
Food inflation is going to hit poor countries especially hard this year. Ukraine is one of the breadbaskets of the world, and Poo-tin's genocidal invasion is going to send the prices of staples like corn & wheat soaring. Africa imports ~ 85% of its food from outside the continent, and food & energy inflation is bound to cause unrest, uprisings, revolutions & civil wars in a continent that has seen plenty of these.