By now, pretty much everyone is familiar with the Marvel Comics version of Thor, but the Norse probably saw him as a redhead. His famously short-handled hammer, Mjollnir, was supposed to be responsible for thunder. It could also level mountains. In a worship context, Thor is a strong, honorable god whose auspices include protection and service.
Despite what movies might imply, Thor’s mother is the jotun Jord, rather than Frigg. Loki is also his uncle(whether by blood or by oath depends on the source), not his brother.