Adding social proof by displaying your client logos is a great way to boost your credibility. Maybe you’ve tried adding logos to Image Blocks and tried to get them to line up and sized correctly. Then you’ve tried using a Blog + Summary Block but the logos get super-sized and cropped unappealingly. But here’s what worked for me.

Create a Blog with your logo images as thumbnails
Go to the page you’d like to have your logo wall, insert a Summary Block, set the Display to Grid, and ensure that only the thumbnails are displayed and nothing else (i.e. uncheck ‘Title’ & ‘Excerpt’ and set all Metadata to ‘None’).
Add the code below to Design > Custom CSS
Adjust the margins & mobile width to your liking.

/* Logo spacing */
.sqs-block-summary-v2 .img-wrapper img {
object-fit: contain !important;
left: auto !important;
height: 100% !important;
width: 100% !important;
}
.sqs-block-summary-v2 .img-wrapper {
margin: -2em auto !important;
}
/* No Click */
.sqs-gallery-design-autogrid {
pointer-events: none !important;
}

/** Mobile **/
@media only screen and (max-width: 640px){
/* Summary Block width */
.sqs-gallery-design-autogrid {
width: 65vw;
margin: auto;
}

/* Logo spacing */
.sqs-block-summary-v2 .img-wrapper {
margin: -2.5em auto !important;}
}

Hope this post was helpful!