Block are an extremely useful/easy way to create repediative geometry. To create fancy blocks you need the block editor.
If i am putting together a layout of an office floor and in that office floor there are 100 cubicles and in each of those 100 cubicles there is a desk a chair a computer a phone a filing cabinet. To draw each of the items 100 times is a lot of work for such a relativley simple design.
One cloud just draw it once and copy the data but this can become a problem if you place the copy in the wrong spot. Yes you could group it and the would solve that problem, but what if you had it grouped and copied and then they wanted the phone changed. you would have to go in and select these individual and delete them. If they were block you could just change the definition file.
This is just one example of how useful blocks are. The elements in the block editor its self give you a way to greatly increase the value of these blocks.
The block editor is needed to be a separate environment as there are properties of block that are unique to blocks so you have to have a separate environment to manage these. Things like base points dont make much sense if you have run of the mill geometry. They make sense when you have a group of geometry that you need to manipulate all at once.
This is a fundamental concept of CAD. i would recommend (as previously suggested) that you look at some of the resources readily available out there. the help file if great. There are also several website that offer free tutorials. Also Autodesk has webinars that cover some of these basic topics like blocks and the block editor.
CADnoob
