If you did not disable the option "Integrate WinRAR into shell" when installing WinRAR, several additional items will be added to the standard file and folder context menus, which appear when you click the right mouse button on a file icon in Explorer or Desktop.
For archives WinRAR adds the items: "Extract files…", "Extract Here" and "Extract to <folder name>", where <folder name> is replaced with the real name of the folder. All the commands call WinRAR to extract archive contents, but the first command allows you to enter the destination folder and some extraction options in Extraction path and options dialog, while the second performs extraction to the current folder and the third to the proposed folder without additional questions. When you unpack a group of archives, the context menu will also include "Extract each archive to separate folder" item allowing to place contents of each unpacked archive to separate folder.
Also WinRAR modifies "Properties" item of archives context menu to show archive information and, if present, archive comment. The archive information is similar to that displayed by Show information command, the only difference is that detailed authenticity information is not shown. This feature is not supported in Windows x64 edition.
For common files and folders WinRAR adds items: "Add to archive…", "Add to the archive <archive name>", "Compress and email…", "Compress to <archive name> and email", where <archive name> is replaced with the actual name of the archive. Both "Add" commands call WinRAR to add selected files to archive, but the first command allows to enter the archive name and some compression options in Archive name and parameters dialog, when the second starts adding to the proposed archive without additional questions. Similarly, both "Email" commands compress selected files and attach a created archive to email message, but the first allows to set additional options. You need to have a MAPI compliant email program installed to use these "Email" commands (most modern email programs support MAPI interface).