Well that’s an interesting question without a simple answer! At its most basic, silver - like all metals and most commodities - has a spot price. That’s the market valuation of a resource in a readily utilisable form - I’ve spent most of my career in metal (not PM’s though) and spot prices are very widely used as a staple price guide. From there, there is the spread - the % difference that dealers will buy and sell at and so make their profit. For PM’s this may be relatively small, up to 5% for gold but often a couple of percent. For copper and titanium, to use as random examples, this may be as high as 20% depending on several factors.
The spot price is not guided by simple supply and demand, though it does have an effect. It is rather more heavily impacted by market sentiment and outlook. For example, I traded several millions of pounds worth of copper when demand was relatively low but economic outlook for the Far East was very good and prices were correspondingly high. Careful timing led to a handsome profit for my employer.
With PM’s, there’s a lot of other factors. The form of the Silver plays a big part. Bars, coins and bulk ingots carry differing premiums. Proof silver of a rare coin such as a Libertad will carry a much heavier premium than a cast kilo bar. I won’t comment on the vagaries of PM markets as I would be commenting on a hobby that I find interesting rather than from a place of experience and knowledge. Maybe my knowledgable friend @Pete could offer some of his wealth of knowledge on this subject as his knowledge of the PM world is surpassed only by his generosity of time spent assisting those of us with less experience. @BackyardBullion and @ChrisSilver also offer very sage words indeed on the subject. I can whole heartedly recommend @BackyardBullion YouTube channel for a source of bullsh1t free refreshingly level headed information and opinion.
Finally, decide the reason for your foray into the PM market. A store of value is a very real and well guided reason for PM investment. Timing the market and trying to win big is not necessarily the best reason reason - though it has been done and undoubtedly can be done again with sufficient research and dedication. Hope that helps you out a bit.