Watch bands made of metal tend to be called watch bracelets, where they're made up of chains of metal links or meshes of metals such as stainless steel.
Watch bracelets are durable, tend to be quite heavy and are less prone to smell than fabric/leather bands as they don't absorb water. They tend to be used in certain types of watches. Sports watches for example often have metal bracelets of various types and dive watches will often have stainless steel/titanium bracelets, as these metals are very durable and resistant to corrosion.
Generally, there are pros and cons to both straps and bracelets, where you may have a preference for one or the other, or prefer certain straps/bracelets with certain watches. The extra weight of a bracelet vs a strap for example might be an indicator of high quality to one person or just inconvenient extra weight to another person.
Note that watch 'bracelet' tends to refer to metal watch bands and watch 'strap' refers to softer materials like fabric. Watch 'band' might be used to refer to just metal bands or to both softer and harder materials. This article focuses on metal watch bands/watch bracelets in particular, so if you're more interested in non-metal watch bands see our article on watch strap types to learn more about them.
Oyster bracelet
Oyster watch bracelets were launched by Rolex in the 1930s and are widely used on a range of Rolex watches today. They're made up of interlinked pieces of metal, three-wide, with the middle pieces wider than the two on the sides.
This design has large links and a fairly small number of them compared to some other metal link designs, so this is a fairly durable type of metal bracelet, but also tends to be more stiff and heavier than mesh designs and metal link designs with smaller links.
Jubilee bracelet
Jubilee watch bracelets were launched by Rolex in 1945 to celebrate Rolex's 40th anniversary. They're made up of interlinked pieces of metal, five-wide, where the middle three pieces are quite thin and the two on the sides are wider.
This design was originally only available in solid gold, and then later made available in two-tone and steel versions in the 1950s. Two-tone designs may use a gold colour for the middle three pieces or the two outer middle pieces and a silver colour for the other pieces. Often the middle pieces have a polished finish and the outside pieces a matte finish.