Logo mockups provide a great way for designers to showcase a logo to present to their clients. It also helps the designer to see the logo in a new context and make any new tweaks if needed.
Peter Olexa from Cruzine Designs has designed 9 of the best logo mockups I have ever come across. If you want high quality logo mockups then you have to check out his collection on Creative Market. They come in 9 unique styles and have smart objects which allow you to easily implement your logo. All mockup templates are in Photoshop files with hi-res 2300 x 1600 pixels.