Flickr

Flickr's embed code is not mobile friendly.  The best way to link to a flickr album is to make a clickable image and make it link to the flickr share URL.
This approach can be used to link to any external resource you wish to promote to your visitors.

Note: Any images you uploaded need to be web-ready: How to make a web-ready image.

One way to create a clickable image is to include a 'Homepage hero image' content type directly in your page (but this has the disadvantage of opening the new page in the same browser tab):

An arguably better way would be to use a 'Promo Box (Large)'.  This content type requires a web-ready 3:2 ratio image (310 x 220).

This has the advantage of allowing you to open the flickr album in a new window (by adding "target="_blank to the end of the link address.  Note: you need to add both inverted commas):

There are many other content types you could use, which would link to your flickr album.
For example, you could use an Icon link (the 'Person on front of 3 mountains' icon would be a good choice here).
or a Widescreen Landing Page Hero Carousel,
or a content block - with or without an image.
(Note: Icon links have the option to open in a new tab and the " _target="_blank hack can be used on these other suggested content types)

And, of course, you can always add a textual link to the album, or add a foreground image to your content, select it, and turn it into a link to Flickr
When creating text / image links to a non-NUI Galway site, remember to change the target to _blank so that the new site will open in a new tab.