Filters and extensions
The filters in Inkscape work in a very similar way to those offered by Photoshop, GIMP or the many applications that we have on computers and mobile phones to improve or distort our images. But in Inkscape's case, the filters work on vector images, so the final result can continue to be edited.
Explaining them one by one at this time is not very useful and it is much better to test them freely with any object we create:
Filters can stack on top of each other, achieving combined effects.
In addition to the filters we also have other extra options, in this case in the top menu "Extensions". Its use is not so simple, since sometimes it is requested that the object be converted into a path or that there must be two objects: one that receives the effect and another that creates it. In any case, it is quite beyond the scope of this course.
If you want to know more about Extensions you can see this post.