Unlike facebook, LinkedIn creates entire posts just for likes and comments which fills up the feed with crap. This snippet removes those posts from the feed. Best used with an Chrome extension like "Custom JavaScript for Websites".

LinkedIn - Remove crap posts.js

// ==UserScript==
// @name         LinkedIn - Remove crap posts
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Unlike facebook, LinkedIn creates entire posts just for likes and comments which fills up the feed with crap. This snippet removes those posts from the feed. Best used with an Chrome extension like "Custom JavaScript for Websites".
// @author       GFoley83
// @author       amg1127
// @match        https://linkedin.com/feed/
// @match        https://*.linkedin.com/feed/
// @run-at       document-idle
// @grant        unsafeWindow
// @require      https://code.jquery.com/jquery-3.4.1.min.js#sha1=88523924351bac0b5d560fe0c5781e2556e7693d,md5=220afd743d9e9643852e31a135a9f3ae
// ==/UserScript==

(function(page, $) {
    'use strict';

    $.expr[':'].textEquals = $.expr.createPseudo(arg => {
        return ((elem) => {
            return $(elem).text() == arg;
        });
    });

    let timer = null;

    const removeCrap = () => {
        timer = null;

        const $crapSelector = $(`
span.ember-view > span:textEquals(" likes this"),
span.ember-view > span:textEquals(" loves this"),
span.ember-view > span:textEquals(" celebrates this"),
span.ember-view > span:textEquals(" finds this insightful"),
span.ember-view > span:textEquals(" is curious about this"),
span.ember-view > span:textEquals(" commented on this"),
span.ember-view > span:textEquals("Short course you may like"),
div.feed-shared-text-view span:textEquals("Promoted")
`, page.document);

        const crapCount = $crapSelector.length;

        if(crapCount === 0){
            return;
        }

        $crapSelector
            .closest('.relative.ember-view')
            .filter(`:not(:has(span.ember-view > span:textEquals(" • 1st")))`)
        //  .remove(); // Instantly remove
        //  .css('opacity','0.3'); // Fade out instead of remove
            .fadeTo (1000, 0.3); // Animated fade out

        console.log(`Removed ${crapCount} LinkedIn BS posts.`);
    };

    const removeCrapTrigger = (mutationsList, observer) => {
        for (let mutation of mutationsList) {
            if (mutation.type === 'childList' && mutation.addedNodes.length > 0) {
                if (timer === null) {
                    console.log(`removeCrap triggered.`);
                    timer = window.setTimeout (removeCrap, 1000);
                    return;
                }
            }
        }
    }

    const targetNode = document.body;
    const config = { childList: true, subtree: true };
    const observer = new MutationObserver (removeCrapTrigger);
    observer.observe (targetNode, config);

}) (unsafeWindow, jQuery.noConflict(true));