Bonus spins is often what you really are looking for because of good profitable wins is around the corner with multiplicators and other combinations. To have the possibility to respin trigger doesn´t make things less interesting., so how does it work then.
When you get bonus spins in a slot it is based on a number of combined symbols, it varies between slots but often there is a special symbol that should be present with three or more. At least three symbols are needed to activate the bonus spin mode and if you get more sometimes additional bonus spins will be added to the first ones.
To retrigger bonus spins is something that is really desirable and it means that you under a bonus spins round will again get the combinations for bonus spins and then will be rewarded with additional bonus spins put above the ones that you already have.
Retrigger works at several times so you can actually get several retriggers under an active bonus spins round. It is not easy and it is not so common either but it is very possible. If you get retrigger of bonus spins it can be really profitable since the bonus spins round also have some extra features to increase wins.
As a summary the bonus spins retrigger function is surely something that you will experience if you play slots and it is a special feeling when you get this function.