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Alcohol Tolerance - The ability of yeast to continue fermentation in the presence of alcohol.
Attenuation - The amount of wort/must sugars a yeast can consume.
ABV - The measurement of alcohol by volume determined by measuring the difference between original and final gravity (and dividing by 0.0075).
Flavor Profile - The flavors resulting from esters, acids, terpenes, and thiols during fermentation.
Flocculation - The behavior of suspended particles in wort/must that tend to clump together in large masses and settle out.
In short, everything above will affect whatever you are brewing. However, with a little knowledge, you have the ability to determine how they will affect your next brew.
Alcohol tolerance, attenuation and flocculation are commonly designated by High/Low or percentage in the specs (sometimes) listed on the sachet of yeast.
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