This is rather nicely handwritten (which I believe is actually normal for most documents which pass the 'seal appointed by the Treaty of Union to be kept and made use of in place of the Great Seal of Scotland') warrant appointing the Right Honourable James Wolffe Q.C. as Lord Advocate on 2nd June 2016.
The Lord Advocate is now the principal legal adviser to the Scottish Ministers. Before devolution, he was likewise the principal legal adviser to Her Majesty's Government in matters of Scots Law. However, unlike the Attorneys-General in the other constituent countries, the Lord Advocate maintains a much more active role in prosecutions: he is in effect the Scots equivalent of the Director of Public Prosecutions and all prosecutions are made by the Procurators-Fiscal in his name.
The Latin text at the bottom is "per signaturam manu s[ereneissimi] d[omini] n[ostri] reginae supra scriptam" or something like "by the Sign Manual of our Sovereign Lady the Queen above"; the Scots equivalent to 'By Warrant under the Queen's Sign Manual' denoting that the warrant has been prepared and has passed the 'Great Seal' in pursuance of a warrant Her Majesty has signed.