The first option allows you to hide the alignment view: users will not be able to see the view with personal, team and organisational lists on the Objectives overview page.
The second option lets you configure the Key Results Progress Types. You can enable/disable one or all of them and set the default type.
The third option is to enable or disable objective scoring. When this setting is enabled, users will be asked to score their completion after finishing an objective. The options are 'not completed', 'completed', 'overachieved'.
The last two options let you handle team objectives. You can link personal objectives to teams and have team members manage team objectives.
In the Visibility tab you can set the visibility levels for personal and team objectives. Objectives are always visible for the person they apply to. In these settings you can choose the possible choices the users will have to display their objectives to other people in your organisation.
In the categories tab, you can set different objective categories from the division 'personal, team and organisation'. You can here add your own division that makes sense to your company (e.g. career skills, personal development,..). You can make as many categories as you like!