For all but very big websites Google analytics is enough. If you do not install analytics the data will be lost. You will not get information about your website visitors before the analytics is installed. It is free and takes minutes to install.
Almost any web developer will install much of the ‘Meta’ information but it may not be useful to help Google channel the correct web searchers to your website. Usually, you are paying for this anyway; why not have it done to aid product marketing in the first place?
When you add pages to your website about a product or service, it is best if the name of the page contains the word that people may be searching for. For example www.company.com/xyzervice. Instead of www.company.com/456_r2 . Google actually uses the names found in page addresses as its ranking of that page.