It means the coin has heavy wear.
If you mean numismatic VG condition (actually fairly well worn), about $20.If you mean relative to being quite worn, then maybe $35.
well-worn = $10 lightly worn = $20
well-worn = $35 lightly worn = $170 uncirculated = $900
Condition makes a big difference in the value of this coin :well-worn = $300lightly worn = $1,000uncirculated = $2,500
For any coin, well-struck means it was minted with dies that were not worn, on a planchet with no flaws, with enough pressure to bring out all the details in the desigh.
If you mean a U.S. cent, $20 in very worn condition and $30 if moderately worn If you mean a British penny, around $20 in moderately worn condition.
It means that on the grading scale of 1 to 70 it received an 8 in condition. This means that the coin is very worn.
Assuming the coin has no problems and has never been cleaned .... well-worn = $50 lightly worn = $700 uncirculated = $3,000 or more
1910 is considered a common date for Liberty nickels. well-worn = $1 lightly worn = $20 uncirculated = $45
This date has 3 varieties and the price range is wide even in a well worn condition.Take it to a coin dealer or send it to one of the professional grading services. When you get a grade on the coin then you can get a value.
This coin is fairly valuable based on condition. It has a value of $10 in worn condition. It's valued at $15 in average condition. A well preserved coin is valued at $40. A fully uncirculated coin is valued at $200.
1846 isn't a rare date and so it would be worth somewhere in the neighborhood of $5-10 since it is well worn. Had your coin been uncirculated it could be worth hundreds of dollars, however.