Protecting more people from the impacts of climate change, such as funding coastal-defence systems.
Up to 25,000 people are expected in Glasgow, including world leaders negotiators and journalists.
Tens of thousands of campaigners and businesses will also be there to hold events, network – and hold protests. Extinction Rebellion, for example, are calling for an immediate end to the use of fossil fuels.
At the end of the conference, some form of declaration is expected.
Every country will be required to sign up and it could include specific commitments.
Are there likely sticking points?
Expect a lot of talk about money and climate justice. Developing countries tend to pollute less per head of population and are not responsible for most of emissions in the past.
But they experience some of the worst effects of climate change.
They need money to help reduce their emissions and to cope with climate change. It could mean more solar panels in countries that depend on energy from coal and flood defence systems.
There will also be a battle over compensation for developing countries affected by climate change.
Wealthy countries previously pledged $100bn (£720m) a year to help poorer nations by 2020, but that didn’t happen. So, richer countries will be expected to commit more money.
China’s commitments at COP26 will also be very important. It is now the world’s biggest polluter and has investments in coal stations all over the world.
Many observers will be watching how quickly China – and other major fossil fuel producers – will be willing to reduce their reliance on them.
How will COP26 affect me?
Some commitments made in Glasgow could directly affect our daily lives.