Secondary fermentation

Sorry for the noob question.

When I read beer recipe directions it says leave your beer fermenting for around a week or so in first primary fermentor. Then, when fermentation is done, the air lock stops bubbling, change to a secondary fermentor and continue for as long as needed.

You don't add any more yeast to the secondary fermentor correct? Can I get my beer to a higher abv using a second fermentor? Is it simply for straining the beer of sediment?

Thanks

No need for any additional yeast. It is more accurately described as a bright tank. It is for letting sediment settle only. This will also have no effect whatsoever on the ABV of the beer. That is done through recipe and yeast selection.

Wait 2-3 weeks in primary then check for final gravity then bottle the beer. In most cases, if you are not adding things like fruit, a secondary is not necessary.