What should be done when pouring beer that contains yeast sediment at the bottom?

When dealing with beer that contains yeast sediment, the best practice is to leave the sediment in the bottle unless specifically requested otherwise. This is because yeast sediment can affect the taste, mouthfeel, and clarity of the beer when poured into a glass. Many beer styles, particularly those that are bottle-conditioned or unfiltered, have some sediment that adds to the flavor profile, but often it's preferable to keep this sediment separate from the pour.

When poured directly into a glass, the sediment can settle out and create a gritty texture or a cloudiness in the drink, which can be undesirable for many beer enthusiasts. By leaving it in the bottle, you maintain the intended drinking experience of the beer, ensuring that the drinker enjoys a clean pour. If someone expresses a desire to have the sediment mixed in, you can then accommodate that request, but it's generally best served separately.

Pouring everything from the bottle, shaking the bottle before pouring, or mixing the sediment into the beer could lead to an unpleasant drinking experience for many. Shaking the bottle could disturb the sediment, causing it to cloud the beer further and risk creating excessive carbonation and overflow.