The first two verses of 1 Peter 1 contain three helpful pieces of information.
The words exile and dispersion are rightly read in two ways, literally and figuratively. Every Christian has two homes, earth and heaven (see Philippians 3:20). And every Christian will always feel that earth is not our home.
The word foreknowledge reminds us that God knows everything. Every single word ever spoken, both past and future. Every event of every day. Every thought of every mind. Every gift He gives. Every temptation we fall into. This is no small thing. It is one of things that makes God god.
The trinity appears in verse two. It is good to notice when the trinity is spelled out like this. It is not that common. We make the mistake of thinking of God in the singular. He is three in one.
Below is a map so you can see the places mentioned in verse 1.

