I use the following applications daily.
Outlook (email). I read forward or respond to emails. These are constantly pinging into my inbox - probably about 100 a day. Each individual workplace will have it's own email etiquette and you will soon pick this up. My diary is also managed via outlook and meetings are sent, requested and logged through this.
Microsoft Teams. I use this to manage my team remotely and in the office. I can use it to collaborate and work on documents/spreadsheet/slides alongside others. Most of our meetings are conducted through this as well (unless face to face).
Microsoft Word. I do a lot of project and governance work and most documents/reports will be written up using this function. I always QA a lot of reports, so I use it to make track changes or notes on other people's work.
PowerPoint. When giving a presentation I use this to produce slides which I can share of a projector or on a screen in a team/zooms meeting. These are quite easy to produce with lots of templates, but there is a skill to getting the right amount of content on the slide. I prob do at least 1-2 a week.
Excel. I use this for all sorts - projects plans, budget monitoring, time sheets. It looks a bit dull and complicated but it is very clever. There are loads of tutorials online.
Adobe - I use this for creating pdf, graphic stuff, making my work look more professional ect.
In house web-publisher. I use this to publish reports online, create Web libraries etc.
Self serve - internal hr systems. Logging leave, staff sickness, payroll stuff.